So basically I got fed-up with seeing so many questions about TP2 models and their supported frequencies.
I'm an American so most of this information is geared towards helping other Americans- but it may also be of use to people in other parts of the world.
If you aren't a big tech-wiz, READ THIS before you buy your Touch Pro 2.
Here is the low down:
There are two different prominent cell phone technology standards in the world today: GSM and CDMA.
Most of the world runs their 3G cellular networks on GSM. However some carriers such as Verizon, Sprint, Bell, and Telus work on CDMA.
GSM= Sim Card
CDMA= No sim card
-Note however that CDMA "world phones" have sim cards because they also include GSM tuners.
Here are the Mobile Telecommunications Standards that matter to you:
GENERATIONS:
1st Generation (1G):
~don't worry about it, only primitive cell phones operated on this standard.
2nd Generation (2G):
~here we go this is GSM!!! This is what matters
~this is also where current CDMA networks really started rolling out.
2.5G:
~EDGE, this is the GSM that you use if you aren't on 3G. EDGE is important, memorize the name!!!
3rd Generation 3G):
~now we are talking, UMTS (Universal Mobile Telecommunications System). In Europe UMTS may also be called "W-CDMA" although it is GSM (sim cards!!!) This is 3G that the Iphone was named after. It is GSM.
~EV-DO (Evolution Data Optimized), this is the 3G of CDMA. this has revisions such as EVDO rev "A" or "B" that can be considered 3.5G
3.5G:
~HSPA (High-Speed Packet Access)= HSDPA/HSUPA. The "D" in HSDPA stands for downlink, the additional "U" in HSUPA stands for uplink.
~ EV-DO revisions.
4G:
~LTE, blazing mobile broadband. This is GSM and what most of the world is migrating to, EVEN CDMA carriers.
~WiMAX. No sim card, because it is not a GSM technology. Think of it like Wi-Fi on steroids. Compare it to LTE like we can compare HSPA to EV-DO today. Understand WiMAX now?
Whew, now that we have all the standards explained, lets talk about what this means.....
DON'T BUY a phone and expect to get 3G on it UNLESS it SPECIFICALLY states that you can get 3G for your carrier on it.
Some common hints:
"European Version"= 3G for many carriers in Europe, EDGE everywhere else, nothing at all for CDMA.
"World Phone"= a CDMA phone that is also capable of GSM. Only capable of 3G (EV-DO) on the carrier that the phone is branded for. Will work on EDGE everywhere else for GSM carriers.
"US Version"= a GSM phone that works on AT&T's 3G network but NOT T-mobiles.
~~Phones that you buy from your carrier will work on your carrier's 3G bands. (Unless your carrier doesn't have 3G yet in your area)
JUST BECAUSE A PHONE SUPPORTS THE SAME BAND DOES NOT MEAN THAT YOU CAN GET 3G ON IT.
MANY 3G BANDS ARE SHARED, BUT ARE SLIGHTLY DIFFERENT. This means that even though carriers such as T-Mobile and AT&T share bands, the phones that support 3G on each are not interchangeable with carriers. EDGE, on the other hand, works interchangeably.
Lastly, 3G support and other wireless standard compatibilities have nothing to do with the software of your phone. You will never find a magic ROM that will enable 3G on a carrier that does not support the phone. It is all HARDWARE DEPENDENT.
Questions?
Also if you need more information, read the posts after this one. There are lots of smart people on xda-developers. I'm sure some will write additional information, clarify, or even correct something that I wrote.
somebody should sticky this, its useful for newcomers
skyler17 said:
2.5G:
~EDGE, this is the GSM that you use if you aren't on 3G. EDGE is important, memorize the name!!!
Click to expand...
Click to collapse
Not necessarily true. EDGE can actually technically be classed as 3G (though it almost always sits in the higher end of the 2.5G tier). 2.5G would more correctly refer to GPRS rather than EDGE, with EDGE being more of an enhancement to GPRS.
skyler17 said:
. . . .
Most of the world runs their 3G cellular networks on GSM. However some carriers such as Verizon, Sprint, Bell, and Telus work on CDMA.
GSM= Sim Card
CDMA No sim card
Click to expand...
Click to collapse
When it comes to PDA/WinMo phones "CDMA = No SIM card is false". There are actually a couple of CDMA phones with SIM cards including the Touchpro2.
HSPA is a catch all name for HSDPA and HSUPA, 3.5G techs.
The 3G implementation is UMTS.
If you are talking about worldwide use, EDGE is pretty much not used in the UK... O2 have it on a couple of base stations but its extremely rare, so here you just get:
1G - Analogue phones, Vodafone and O2 had analogue networks but they are now shut down.
2G - GSM with CSD (Circuit Switched Data - make a phone call for data) and HSCSD (High Speed Circuit Switched Data - basically make multiple phone calls and bond them, was only availible on Orange). O2 and Voda use both 900MHz and 1800MHz. Orange and Tmobile have no 900MHz license and use just 1800MHz. 3 Do not operate a 2G network and these days use Orange for coverage where they don't have their own network, they used to use O2...
2.5G - GPRS (General Packet Radio Service) This is the lowest speed you'll get on any network now, up to about 115kbps, on all four 2G networks, indicated by a G on the screen near the signal metre.
2.75G - EDGE (Enhanced Data Rates for GSM Evolution) initially capable of 236kbps, only O2 ever did anything with it, and they did very little with it, for all intents and purposes it is unused in the UK.
3G - UMTS (Universal Mobile Telecommunications Service). This is what is known as 3G in the UK. It uses WCDMA - yes, it is CDMA based, not TDMA as 2G GSM is. Capable of 384kbps, this is needed for video calls (which all UK networks support). Indicated by a 3 onscreen, all UK towns and cities are covered by this or better these days by all networks (advantage of a small country with dense population). All 5 big operators have 3G licenses. At the moment 3G means 2100MHz, Ofcom want to have some of Voda and O2's 900MHz allocation back and allow 3G on it. High frequencies mean short range, making the current band good for getting alot of transmitters (and hence capacity) in cities, but crap for covering rural areas with 3G, you need too many transmitters for cost effectiveness. If Ofcom reallocate some of the 900MHz band and allow 3G on it, it could massively improve 3G reception in rural areas.
3.5G - HSPA (HSDPA and HSUPA). Up to 14.4mbps down (Voda in trial at this speed) other networks 7.2mbps and 3.6mbps. Indicated by a H on screen. Will see this in most major towns and cities.
Say you have an European TP2, which, as we know, does not support AT&T's 3G. Will it support US HSDPA?
dementio said:
Say you have an European TP2, which, as we know, does not support AT&T's 3G. Will it support US HSDPA?
Click to expand...
Click to collapse
Nope, its all or nothing. Even though it supports the downlink band, since it is missing the uplink band it will not support US 3G.
It will give you EDGE however.
Related
I'm new here and I enjoyed this site very much. I have one problem with my TP2. Somehow, 3G network is not working after I installed Hard-SPL and unlocked T-Mobile TP2 switch to AT&T sim card. Everything is working fine with AT&T's sim card I was able to made phone calls, received, SMS, and web browsing. ATT 's 3G network is available around my home, but I can not get 3G on TP2 instead a EDGE network. Can unlocked TP2 handle AT&T's 3G network? or a .cab file I can download to fix this?
idk for sure but i think t mobile uses a different frequency for 3g from at&t so if they are you are stuck with edge speeds on at&t man sorry
I have the tmobile TP2 and i can confirm from talking with ATT that the phone does support ATT BUT i was unable to use the phone on 3g. The phone DOES support the signals for 3g but am still unable to access the towers in my area. I think the phone may be hard set to look at tmobile towers, is there any way i could reset the device to open up its tower usage? Hopefully i can get an answer but no tmobile TP2 users arent screwed in the US we just need to find a fix
It was my understanding that the tmobile tp2 does NOT have 850/1900mhz 3g on it. It does have aws 1700 for sure. Not sure about 2100mhz though for overseas.
This issue has been covered many times in the numerous AT&T threads on this board.
I'm sorry to tell you that the T-Mobile TP2 hardware radio was limited to using 3G over the 1700/900Hz frequencies, while AT&T currently uses 1900/850Hz only. It's unlikely that any change can be made to the radio software wise to fix this issue.
Just to make things clear the issue has nothing to do with Hard SPL or custom roms.
T-Mobile UMTS 1700/2100 Mhz
T-Mobile 3G runs on UMTS 1700 up and 2100 down. Unless you have a device that runs on those specific frequencies, EDGE is the best you can do with T-Mobile if you opt to run on their service.
ATT offers UMTS or 3G using 850mhz(the old TDMA band) and 1900mhz. While T-mobile offers HSDPA (technically 3.5g part of the UMTS specification) using 1700MHz for uplink and 2100MHz downlink.
Because HSDPA is part of the UMTS spec, it’s backward compatable. However, you have the limiting factor beging that the frequencies the individual carriers use to transmit the data.
Europe and Asia’s 3G runs on 1900/2100mhz. North and south America is supposed to use the (AWS) 3G spec using 1700/2100mhz
ATT didn’t want to wait, like T-mobile is doing, for homeland security to vacate those frequencies and launched on 850/1900mhz instead
ace.app said:
ATT didn’t want to wait, like T-mobile is doing, for homeland security to vacate those frequencies and launched on 850/1900mhz instead
Click to expand...
Click to collapse
I heard that t-mobile did not have enough spectrum in many areas to launch 3g in its existing 1900mhz. At&t doesn't have that issue, or as bad.
Im gonna make this real easy for u. The tmobile tp2 will not work on at&t 3g. The 3g bands are different
Exactly what cellular radios does this phone [Telus TP2] have?
My carrier [Telus] has recently completed their 3G overlay, and I'm still showing "EV".
Should I be talking to them about fixing this, or...?
It was (is?) my understanding that this phone was fully 3G capable.
Can someone help me with this?
As far as I can tell, my phone should support the Telus overlay of HSPA on their CDMA network, however I'm showing "EV" an my network type on the notification bar.
I visited a Telus store, and talked to a rep, who just babbled to me about how my SIM was "registered" as a CDMA phone, and therefore I couldn't use HSPA.
>_>
Thoughts?
EDIT: The rep also fed me this convoluted bullsh*t about how when I'm roaming, I'll be able to be on HSPA networks, so I'll get better bandwidth roaming than on my home network...
Wow no one knows the answer to this?
I've searched, and there's no answer, per se, just descriptions of Telus' technology and the antennae in the TP2, which seems to indicate that the TP2 should be able to get on the Telus HSPA network...
I have a SIM-unlocked Telus Touch Pro2 I bought off Craigslist, figuring it'd be good to go when the HSPA network rolled out (Only four months later!). As I understand it, the telus model can make and receive calls on quad-band GSM frequencies, but only use EDGE speeds for data. Has to do with the firmware for the chipset inside the phone. The only HSPA 3G band the phone can use is 2100 Mhz, which is the bad used in Europe, not Canada. It's a major piss-off, especially when a month ago the stores made this out to be the top-of-the-line phone, perfect for ever and ever.
It would seem that should Telus decide to plug in some firmware upgrades, they could activate the new 3G bands, but why bother? We've already signed away our souls to the company.
Who knows, maybe they'll fix it when they release Windows 6.5 for our rig. Because that's on the top of the to-do list, right?
Well there are new radios that we could flash...would that change anything?
Now I may be misinformed but I think that the Telus version is a CMDA phone with GSM capabilites on some frequencies. I do not think it will work on HSPA in Canada as they use different frequencies (850 and 1900). This is why so many people were waiting for the ATT version to come out as it uses those frequencies.
Remember GSM does not equal 3G.
What I would like to know is whether the distinction between 3G and GSM is on the hardware side, firmware side, or software side. Telus would have you assume it's all the hardware's fault, but I'm not sure on that one.
From everything I have read its the chip in the phone that isnt programmed/capable of doing the frequencies required. It may actually be a second chip but I cant confirm that. Other posts have stated that there wont be a software fix to "unlock the frequencies" needed.
GSM is a cellular line and 3G is a data connection.
I just purchased an At&t Tilt 2 unlocked for use on Telus 3G+ network. The Telus Touch Pro 2 is a CDMA , Quadband GSRM and UMTS/HSDPA 2100. The Telus TP2 will only work with EVDO data on the Telus network. If you unlock it for use with Rogers it will work on GSRM with Edge data. That is why I have ordered the At&t Tilt 2. Unfortunately Telus won't honour my unlimited data plan and say it is only for EVDO and that I have to change to one of their current plans to have HSDPA. Like all of the networks, they get your money one way or the other. I'm pleased that with the Tilt 2 I am free to switch providers here in Canada and still get 3G as well as when I travel in Europe.
Hi
Im looking for a TP2, I will use it outside USA mainly, is there any differences in the phone model between what is offered by the carries (I mean the case, the colors, the device modules as gps, radio or whatever, the keyboard)
As i have noticed that the T-Mobile unit is another color from the at&t and have differences in the keyboard, are there any recommendations on what to look for on this phone?
It seems that the only current options are T-Mob and At&t as they are GSM (it seems that t-mob dont have the chrome bezel or 3g support, and at&t has those but dont have camera)
There are some minor differences between the two , there was alink that gave a great deal of info on both phones that is better then this one below
http://forum.xda-developers.com/showthread.php?t=573092
ahh here it is
http://pdadb.net/index.php?m=pdacom...&id3=1792&id4=1829&id5=1766&id6=1989&id7=1751
thank you very much for the links
I see that the cdma phones (verizon, sprint) have a gsm sim port, is that true? can a TP2 cdma phone (when unlocked) be used with any sim on a gsm network? (mostly because im not very fond on the t-mob version)
Lioric said:
thank you very much for the links
I see that the cdma phones (verizon, sprint) have a gsm sim port, is that true? can a TP2 cdma phone (when unlocked) be used with any sim on a gsm network? (mostly because im not very fond on the t-mob version)
Click to expand...
Click to collapse
No CDMA and sim are two different things
The Major Carrier Technologies
By now, you’ve probably heard all of the acronyms in the alphabet soup of carrier technologies. The two major terms that pertain to cellular phone communication that you’re likely to run into are GSM and CDMA, the two major technologies service providers use to carry voice signals across the network. But what are they and why do they matter? Well, for starters, let’s define the terms.
GSM (Global System for Mobile Communications). GSM is the “branded” term referring to a particular use of TDMA (Time-Division Multiple Access) technology. GSM is the dominant technology used around the globe and is available in more than 100 countries. It is the standard for communication for most of Asia and Europe. GSM operates on four separate frequencies: You’ll find the 900MHz and 1,800MHz bands in Europe and Asia and the 850MHz and 1,900MHz (sometimes referred to as 1.9GHz) bands in North America and Latin America. GSM allows for eight simultaneous calls on the same radio frequency and uses “narrowband” TDMA, the technology that enables digital transmissions between a mobile phone and a base station. With TDMA the frequency band is divided into multiple channels which are then stacked together into a single stream, hence the term narrowband. This technology allows several callers to share the same channel at the same time.
CDMA (Code Division Multiple Access). CDMA takes an entirely different approach from GSM/TDMA. CDMA spreads data out over the channel after the channel is digitized. Multiple calls can then be overlaid on top of one another across the entire channel, with each assigned its own “sequence code” to keep the signal distinct. CDMA offers more efficient use of an analog transmission because it allows greater frequency reuse, as well as increasing battery life, improving the rate of dropped calls, and offering far greater security than GSM/TDMA. For this reason CDMA has strong support from experts who favor widespread development of CDMA networks across the globe. Currently, you will find CDMA mostly in the United States, Canada, and North and South Korea. (As an interesting aside, CDMA was actually invented for the military during World War II for field communications.)
Domestic Travel
The cellular showdown: CDMA (Code Division Multiple Access) vs. GSM (Global System for Mobile Communications).
Because you can find GSM and CDMA in use all across the United States, it might seem at first that it really doesn’t matter which technology you choose. This is not so. When you travel abroad, the likelihood that you will reach areas that do not have digital service is quite high. Anytime you travel between offices via car, train, or bus you will pass through rural and suburban areas that only offer analog access. Most CDMA cell phones include analog capability (also known as roaming), so a user can make calls when he is not in a digital cellular service area. GSM phones usually don’t offer this capability unless you purchase and use a specialty (read: expensive) handset. Of course in most of Asia and in Europe, this is not a problem because digital service is available almost everywhere you turn. This does become an issue for users in North America, however, because digital service is rarely available there.
Another difference between GSM and CDMA is in the data transfer methods. GSM’s high-speed wireless data technology, GPRS (General Packet Radio Service), usually offers a slower data bandwidth for wireless data connection than CDMA’s high-speed technology (1xRTT, short for single carrier radio transmission technology), which has the capability of providing ISDN (Integrated Services Digital Network)-like speeds of as much as 144Kbps (kilobits per second). However, 1xRTT requires a dedicated connection to the network for use, whereas GPRS sends in packets, which means that data calls made on a GSM handset don’t block out voice calls like they do on CDMA phones.
If you care about 3G go for Tilt2, if not go for unbranded!
I think is the best design/look of all of them
----------------
Guys! go and vote please!
Rhodium needs you
yes, thank you very much for the detailed answers
But the Cdma version of the phones (TP2) claim to be "world phones", as in the sprint phone (cdma) in the feature list they mention that they support GSM when traveling outside of the US and that you can put a GSM sim
Sprint TP2 features:
Cellular_Networks: CDMA800, CDMA1900
Cellular+Data:Links: cdmaOne, CDMA2000 1xRTT, CDMA2000 1xEV-DO
Secondary-Cellularhone
Dual:Cellular+Network;Operation: Selectable cellular module
Secondary_Cellular_Networks: GSM850, GSM900, GSM1800, GSM1900, UMTS900, UMTS2100
Secondary;Cellular Data:Links: CSD, GPRS, EDGE, UMTS, HSDPA, HSUPA
from h t t p://pdadb.net/index.php?m=specs&id=1792&view=1&c=sprint_touch_pro2_htc_rhodium_w
I would prefer the unbranded phone but only the external case design (at least for me) don't justifies the 600 to 700 bucks price tag, sprint ot tmob can be find for 360
I think I will go with a Sprint or Verizon model, even when they are CDMA they seem be dual cell (cdam and gsm) and they will work just fine on any GSM network
Hi all, Firstly iv got a O2 UK branded desire. Iv already rooted it and im now running leedriod2.2 but my problem is I wish to also install the psfMod But im confused at which file I need to download, as the titlle suggests I need to know if its GSM or CDMA or how can I find this out. Thanks in advance.
suprvibes said:
Hi all, Firstly iv got a O2 UK branded desire. Iv already rooted it and im now running leedriod2.2 but my problem is I wish to also install the psfMod But im confused at which file I need to download, as the titlle suggests I need to know if its GSM or CDMA or how can I find this out. Thanks in advance.
Click to expand...
Click to collapse
CDMA has no SIM, GSM does. Your phone is GSM.
Oh so thats the difference lol, I feel silly now. thanks for the reply.
Kalavere said:
CDMA has no SIM, GSM does. Your phone is GSM.
Click to expand...
Click to collapse
Im almost certain this is wrong.
Its to do with the type of network you operator uses.
Can be found on the HBOOT Screen.
Bravo = GSM
Bravoc = CDMA
Aldasa said:
Im almost certain this is wrong.
Its to do with the type of network you operator uses.
Can be found on the HBOOT Screen.
Bravo = GSM
Bravoc = CDMA
Click to expand...
Click to collapse
Well yes, it's down to the cellular network used, codecs used to transmit the data, different frequency and network structure. But in the most absolute laymans terms, GSM has a removable SIM card and CDMA doesn't.
He wanted to know what file to download for his Desire, not a comparative on the different standards adoped by each technology. So I gave him the most basic answer so he could go ahead and install the program to his phone, makes sense don't you think?
Kalavere said:
Well yes, it's down to the cellular network used, codecs used to transmit the data, different frequency and network structure. But in the most absolute laymans terms, GSM has a removable SIM card and CDMA doesn't.
He wanted to know what file to download for his Desire, not a comparative on the different standards adoped by each technology. So I gave him the most basic answer so he could go ahead and install the program to his phone, makes sense don't you think?
Click to expand...
Click to collapse
well i have to give u right the CDMA is only operating in
2G Network CDMA 800 / 1900
3G Network CDMA2000
GSM in
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 900 / 2100
4G in
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 900 / 1700 / 2100
here is a little about it
In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). Cellular carriers including Sprint PCS, Cingular Wireless, Verizon and T-Mobile use one or the other. Understanding the difference between GSM and CDMA will allow you to choose a carrier that uses the preferable network technology for your needs.
The GSM Association is an international organization founded in 1987, dedicated to providing, developing, and overseeing the worldwide wireless standard of GSM. CDMA, a proprietary standard designed by Qualcomm in the United States, has been the dominant network standard for North America and parts of Asia. However, GSM networks continue to make inroads in the United States, as CDMA networks make progress in other parts of the world. There are camps on both sides that firmly believe either GSM or CDMA architecture is superior to the other. That said, to the non-invested consumer who simply wants bottom line information to make a choice, the following considerations may be helpful.
Coverage: The most important factor is getting service in the areas you will be using your phone. Upon viewing competitors' coverage maps you may discover that only GSM or CDMA carriers offer cellular service in your area. If so, there is no decision to be made, but most people will find that they do have a choice.
Data Transfer Speed: With the advent of cellular phones doing double and triple duty as streaming video devices, podcast receivers and email devices, speed is important to those who use the phone for more than making calls. CDMA has been traditionally faster than GSM, though both technologies continue to rapidly leapfrog along this path. Both boast "3G" standards, or 3rd generation technologies
also known as CDMA2000, is CDMA's answer to the need for speed with a downstream rate of about 2 megabits per second, though some reports suggest real world speeds are closer to 300-700 kilobits per second (kbps). This is comparable to basic DSL. As of fall 2005, EVDO is in the process of being deployed. It is not available everywhere and requires a phone that is CDMA2000 ready.
GSM's answer is EDGE (Enhanced Data Rates for GSM Evolution), which boasts data rates of up to 384 kbps with real world speeds reported closer to 70-140 kbps. With added technologies still in the works that include UMTS (Universal Mobile Telephone Standard) and HSDPA (High Speed Downlink Packet Access), speeds reportedly increase to about 275—380 kbps. This technology is also known as W-CDMA, but is incompatible with CDMA networks. An EDGE-ready phone is required.
In the case of EVDO, theoretical high traffic can degrade speed and performance, while the EDGE network is more susceptible to interference. Both require being within close range of a cell to get the best speeds, while performance decreases with distance.
Subscriber Identity Module (SIM) cards: In the United States only GSM phones use SIM cards. The removable SIM card allows phones to be instantly activated, interchanged, swapped out and upgraded, all without carrier intervention. The SIM itself is tied to the network, rather than the actual phone. Phones that are card-enabled can be used with any GSM carri
The CDMA equivalent, a R-UIM card, is only available in parts of Asia but remains on the horizon for the U.S. market. CDMA carriers in the U.S. require proprietary handsets that are linked to one carrier only and are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activate the new one. The old phone becomes useless.
Roaming: For the most part, both networks have fairly concentrated coverage in major cities and along major highways. GSM carriers, however, have roaming contracts with other GSM carriers, allowing wider coverage of more rural areas, generally speaking, often without roaming charges to the customer. CDMA networks may not cover rural areas as well as GSM carriers, and though they may contract with GSM cells for roaming in more rural areas, the charge to the customer will generally be significantly higher.
International Roaming: If you need to make calls to other countries, a GSM carrier can offer international roaming, as GSM networks dominate the world market. If you travel to other countries you can even use your GSM cell phone abroad, providing it is a quad-band phone (850/900/1800/1900 MHz). By purchasing a SIM card with minutes and a local number in the country you are visiting, you can make calls against the card to save yourself international roaming charges from your carrier back home. CDMA phones that are not card-enabled do not have this capability, however there are several countries that use CDMA networks. Check with your CDMA provider for your specific requirements.
According CDG.org, CDMA networks support over 270 million subscribers worldwide, while GSM.org tallies up their score at over 1 billion. As CDMA phones become R-UIM enabled and roaming contracts between networks improve, integration of the standards might eventually make differences all but transparent to the consumer.
The chief GSM carriers in the United States are Cingular Wireless, recently merged with AT&T Wireless, and T-Mobile USA. Major CDMA carriers are Sprint PCS, Verizon and Virgin Mobile. There are also several smaller cellular companies on both networks.
janielsen said:
well i have to give u right the CDMA is only operating in
2G Network CDMA 800 / 1900
3G Network CDMA2000
GSM in
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 900 / 2100
4G in
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 900 / 1700 / 2100
Click to expand...
Click to collapse
I know this, I don't really care either if you'll excuse my bluntness. The question was simple enough and I gave a very simple answer.
Kalavere said:
I know this, I don't really care either if you'll excuse my bluntness. The question was simple enough and I gave a very simple answer.
Click to expand...
Click to collapse
i dont excute anything
im just pointing out that u are right
an i explaine to the person ho ask fore it
what an how about GSM an CDMA
it has nothing todo whit u or ur answer
In most cases I've seen, GSM are European variants of the device and CDMA are usually US devices.
That is just from my own experience though, so I could be wrong..
Sent from my GT-P1000 using XDA Premium App
Kalavere said:
CDMA has no SIM, GSM does. Your phone is GSM.
Click to expand...
Click to collapse
o yeah?? how comes mine have sim card slots?
yess the CDMAs ussualy not having sim card slots we must injection the number to the phone, but mine have the slots.
for not trying for making another thread, i also want a help from you guys here.
my phones are HTC desire ADR6275,
android ver 2.2
baseband version (also called radio ver) 2.15.00.09.88
kernel 2..6.32.21-g7a207a4
build number 2.11.573.5 CL325935
PRI version 1.70_027
i have trouble for read and access my SIM card for reading phone book and also having call from my SIM card.
is it because the radio version or the OS version or ??
Right now "officially" there are only the HTC HD7 and Dell Venue Pro available on TMobile USA.
Does anyone know which other phones would work (after unlocking) with 3G on TMO US?
er...none?
I think so far only these two WP7 devices supports AWS bands.
On other platforms is different, as in the case of latest High-End Nokia devices (but Symbian OS):
http://pdadb.net/index.php?m=pdacomparer&id1=2823&id2=2599&id3=2601&id4=2574&id5=2475&id6=2379
However it is a fact that the multi-band support, increases the cost. Is better to invest in features that do will be use
Best regards
Many WCDMA devices support the 1900 band, if you don't care the 1700 band.
but he asked about 3g...the phones don't offer 3g. Sure 2g works
3g nope
And consider 1700 AWS band with no longer be T-mo 3G after merger (AT&T needs the AWS band for LTE), you will be insane to spend $$$ on your own handset.
Even on AT&T side, there have been a lot of markets switched over to 850 band for 3G. So, even with a phone that support 1900 band 3G is no longer safe even on AT&T.
foxbat121 said:
And consider 1700 AWS band with no longer be T-mo 3G after merger (AT&T needs the AWS band for LTE), you will be insane to spend $$$ on your own handset.
Even on AT&T side, there have been a lot of markets switched over to 850 band for 3G. So, even with a phone that support 1900 band 3G is no longer safe even on AT&T.
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Depends where you live. I have Omnia 7 on AT&T so it only has 1900 band, and I don't even notice a difference in 3G from my last phone. I'm sure it's probably worse, but I get 3G almost everywhere.
DatDereX1 said:
Depends where you live. I have Omnia 7 on AT&T so it only has 1900 band, and I don't even notice a difference in 3G from my last phone. I'm sure it's probably worse, but I get 3G almost everywhere.
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In my area, all 3G towers were 1900. Then AT&T switched all of them to 850 last year. This year, they switched back to 1900 again. AT&T has indicated in the past that it intends to deploy more 850 band 3G to improve coverage.
I thought the 1900 towers would stay 1900, and new ones would be 850
Virtually all 3G-850 american handsets, also have 3G-1900 band. In other hand, the carriers such as Telstra (Australia) and Telcom New Zealand have also 3G-850, with 3G-2100 band (not 1900); but these last are a minority.
The AWS bands with WCDMA technology (3G), are only used by TMoUS (as we all know); and fatally these bands will be used by "new" Latin American carriers like Nextel Mexico and others like VTR and Nextel Chile.
No larger carrier exists than TMoUS, that use AWS bands, so that all developments in AWS bands, should be first implemented in TMoUS ...until now
DatDereX1 said:
I thought the 1900 towers would stay 1900, and new ones would be 850
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Aparently not. Install new towers cost $$$.
iusauser said:
Virtually all 3G-850 american handsets, also have 3G-1900 band. In other hand, the carriers such as Telstra (Australia) and Telcom New Zealand have also 3G-850, with 3G-2100 band (not 1900); but these last are a minority.
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That's true but most ppl who buy unlocked/unbranded handsets buy the European models which typically only come with 1900Mhz band 3G for NA. Those handsets rarely ever supports 850Mhz.
If I use unbranded ROMs on TMO I have gotten 4G on both my HD2 and 7.
thuddome said:
If I use unbranded ROMs on TMO I have gotten 4G on both my HD2 and 7.
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It's not the ROM but the actual hardware that has the limitation although sometimes ROMs can have band limits as well.
foxbat121 said:
It's not the ROM but the actual hardware that has the limitation although sometimes ROMs can have band limits as well.
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On both my HD2 and HD7 I will get an "H" signal. I was talking to T-Mobile support and they told me that was 4G and I was getting it because of the ROM. I asked why they would restrict the 4G if the hardware would do it and they said it was to control the number of devices on each network. I can only get it with an unbranded ROM. I'm not arguing, just telling you what they said. HD7 according to T-Mobile is NOT a 4G capable phone but mine gets an "H" signal all the time.
thuddome said:
On both my HD2 and HD7 I will get an "H" signal. I was talking to T-Mobile support and they told me that was 4G and I was getting it because of the ROM. I asked why they would restrict the 4G if the hardware would do it and they said it was to control the number of devices on each network. I can only get it with an unbranded ROM. I'm not arguing, just telling you what they said. HD7 according to T-Mobile is NOT a 4G capable phone but mine gets an "H" signal all the time.
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HSPA --> 'H' indicator on your handset (with custom ROM)
HSPA+ --> what T-Mobile advertises as "4G"
The H does not mean 4G. It means you have HSPA. In the carrier-specific ROMs they overwrite the H bitmap with one that shows 3G instead, to "help" their customers and avoid confusing them.
tai4de2 said:
HSPA --> 'H' indicator on your handset (with custom ROM)
HSPA+ --> what T-Mobile advertises as "4G"
The H does not mean 4G. It means you have HSPA. In the carrier-specific ROMs they overwrite the H bitmap with one that shows 3G instead, to "help" their customers and avoid confusing them.
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Good to know...thx