[Q] Can't connect to LTE 4G - One (M8) Q&A, Help & Troubleshooting

I have HTC One M8 international version. Currently I'm in Poland and tried Play and Orange sim cards but phone is not connecting to LTE.
I've tried to lock radio to "LTE only" mode and as you can see on screenshot it sees the LTE cells but is not connecting to them.
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I've tried different ROMs and Radio firmware. Also I've checked which bands enabled in my phone using QXPD and they are: Band 3 (1800Mhz), Band 7 (2600Mhz), Band 8 (900Mhz) and Band 20 (800Mhz).
So in Poland "Play" and "Orange" (shared LTE with T-Mobile) have their LTE based on 1800Mhz (Band 3), so it should be working on my phone.
Maybe someone had the same problem and can help me.

maybe the sim card isn´t prepaired for lte?
I have two sim cards from vodafone germany and only one card has lte, the other one (for Tablet ect.) with the same contract (multi sim) has only gsm.

Well, I've inserted sim card from the other phone which is connecting to LTE, so it's not an option.

Finally I've found a SIM (Play operator) which is working with my phone. Also I've flashed latest Maximus HD ROM (http://forum.xda-developers.com/showthread.php?t=2695706).
So still not clear why Orange is not working, seems also a sim card problem.

But it's still not clear what was the cause of LTE 4G not working: radio firmware or rom. But it's clear that sim card is important.

Related

[Help] CM 7.1-11 Phone signal not working for India

HI
I have installed stable cm7.1-11 yesterday on my stock froyo ROM from india.
Everything works perfect but not phone signal.
In my baseband switcher there is not a option for india.
When I will select hongkong (900/2100) I can get signal properly and can call but I am not able to hear and next person also not able to hear me.
If I will select south koria(2100) there is no network found properly. When network available I can call properly (voice working).
Please help me to select proper baseband for Vodafone in india. I think it is (900/1800).
Now it's working by using latest version from this post
http://forum.xda-developers.com/showthread.php?t=1052745
thats gr8 that you found out the answer...
For me it worked out of box installation of cm 7.1.0-11
Just any one knows how to have all 3 bands 900/2100MHz & 1800 MHz?
I know 2100 is for 3 G, so how to add both 900 & 1800 Mhz for India as instead of only 900Mhz...
I beleave that more band, better network coverage... correct me if wrong...
I'm having same problem with cyanogen stable I'm on t.mobile uk and my signal at the top of my screen is green when it works then it turns grey when I start having problems. I'm talking about the h and signal bars at the top of the screen. Is anyone else seen this problem?? Thanks.
sent from my cyanogen mod 2.3.7 defy running at 1ghz and I absolutely love it
On this its green and my data is fine and works
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Then it greys out and I start having problems
sent from my cyanogen mod 2.3.7 defy running at 1ghz and I absolutely love it

TAB S T-805 Where is LTE???

may tablet tab s 10.5 t805 lte dont has LTE/WCDMA/GSM in Network mode my tablet version is lte it must be present in network mode but my network mode just like 3g varient devices has WCDMA/GSM
My ROM Version is T805XXU1ANH1 UAE
my quastion is its normal or my firmware has a problem
Depends on the SIM / your provider.
pibach said:
Depends on the SIM / your provider.
Click to expand...
Click to collapse
i know that but in my note 4 i have lte/wcdma/gsm option in network mod on same sim card
I got this screen on mine:
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Eventually your providers uses different frequencies that exynos chips cannot support (and Note 4 has snapdragon, right?).
pibach said:
I got this screen on mine:
Eventually your providers uses different frequencies that exynos chips cannot support (and Note 4 has snapdragon, right?).
Click to expand...
Click to collapse
my note 4 is exynos chipset and in network mod options like yours
which firmware do u use on your tablet ?
I am using the Selamba Rom from edan.
i bought LTE Usim but NO lte mode connection in network mod
i change firmware to UK region but no success
what am i doing know ?
my problem has been solved
1. call *#0011# get in to service menu
2. select back in service menu
3.selest all bands GSM/WCDMA/LTE
4. restart t805 after this procedure my 4G networks works but in setting>mobile network network mode >not network option for(( LTE/WCDMA/GSM auto))

Z Play Variants

I'm looking to pick up a Z Play to use on T-Mobile, and I'm trying to figure out how to distinguish between different variants available.
According to willmyphonework, there are 6 different variants of which the Mexican version would work best on T-Mo. What's the best way to identify that the phone I'm looking at is indeed a Mexican version?
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In my opinion. You want the xt1635-02 software channel RETUS (Retail United States) that's what I have and I'm on ATT in Arizona. Depending on which Bands T-Mobile uses I am almost certain that I could put a T-mobile sim in mine now and run T-Mobile with no issuea
Hey ssuds, I have the Moto Z play(RETUS) with Tmobile. I do get LTE and everything. Be advised that there is no wifi calling feature enabled on the MZP for us. (even though freaking Moto G5 Plus has it from Tmobile). As for service I just moved from AT&T to T-mobile. Honestly T-mobiles coverage is crap so I dont think it would matter too much.
I'm using xt1635-02 retus on Republic wireless which uses TMo network. No issues, except for the crappy TMO coverage by me (I also have an att Sim which is my primary account - got a deal for free service from Republic at purchase). Phone also worked very well in Ireland on Eir/Meteor.
Was reading​ in another thread recently that att Mexico devices are Sim locked, do that may be problematic if you go that route. No personal experience.

Sprint LS992 domestically unlocked but data not working at all

I have had my sprint LG G5 domestically unlocked officially by sprint. Calls work with a tmobile or att sim so it is definitely unlocked.
I cannot for the life of me get data to work. The only options I have in "network mode" are Automatic, LTE/CDMA, CDMA and GSM/UTMS. I've tried Automatic and I've tried GSM/UTMS. I have LTE roaming enabled. All LTE bands including bands 2, 4 and 12 enabled. All verified in ##DATA# I've tried switching band priority to 2, 4 and 12 but that didn't help.
LTE discovery picked up LTE band 12 for a split second once but usually it just connects to UTMS and no data on UTMS. This is in an area with great coverage. It says it isn't roaming so maybe that is an issue since the lte bands on the G5 seem to be categorized as roaming lte bands. But not sure why I wouldn't get UTMS data.
APNs are correct.
Anyone any ideas?? Is this phone just crippled for use in the USA?? Do I have to resort to the software hack method to unlock it with hiddencallmenu?
https://forum.xda-developers.com/showthread.php?t=3574819
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Like I said I had it officially unlocked.
I did figure out that I needed to set the APN to default and authentification to none. Works now. Thank you.
Are you still using this device?
If you are, I am curious how things are working. Are all of the voice and data features working properly? I may switch to T-Mobile from Sprint later this month. Thank you.

S9 Dual Sim EU/UK model

Hi guys
Interested in getting the S9 (currently own Mate 10 Pro) But have a few questions I wonder if anyone has the answer to.
First off, will the Dual sim model be dual sim 4G like my Mate 10 Pro is, and will it be able to show network state of both sims simultaneously, like shown in the attached screenshot.
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Secondly, I had a s8 single sim and it was possible to lock it in 4G only mode via a switcher app, will this be possible with the s9 and if so possible for both sims with the dual sim variant.
Very excited about this phone, the first Android phone with 4k 60fps capabilities, and the first with variable camera aperture.
Cheers for any responses!
I have the S9+ dual SIM and it does run both SIMS in 4G mode. However, I've got the Snapdragon variant , not the international Exynos variant - not sure if that makes a difference.
I used to have the S8+ (Exynos version) and that could only do one SIM in 4G, the other in 3G. You can't use both data connections at the same time anyway so not really sure it offers much benefit, but I do remember reading that 4G is less power hungry than 3G so perhaps helps battery life.
Glad I went for the SD845 version as I hear the are battery drain problems with the Exynos version. The only downside seems to be Bixby vision being set to China for shopping, not a big deal for me as it's rubbish anyway
Latest S9 firmware (CSC ROM) does this , see screenshots at :https://forum.softpedia.com/topic/1...tehnologia-volte/page__st__7632#entry22979249 . Besides, it suports dual VoLTE/VoWiFi now.

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