[Q] Can ATT Galaxy Tab 3 make phone calls - Galaxy Tab 3 Q&A, Help & Troubleshooting

I have been using the original Tab 7inch as a mobile office since it came out. It runs my trading programs and phone quality is great enough for business. Can the ATT Tab 3 (7 or 8 in) make phone calls? It appears some international versions can but the ATT model does not have a phone icon. Not sure if just adding a dialer is the solution or if hardware is missing.
Doji

I use an app called "Spare Phone" to use the tablet as a phone. It requires you also have Google Voice .
I use earbuds for the calls.
dojiman said:
I have been using the original Tab 7inch as a mobile office since it came out. It runs my trading programs and phone quality is great enough for business. Can the ATT Tab 3 (7 or 8 in) make phone calls? It appears some international versions can but the ATT model does not have a phone icon. Not sure if just adding a dialer is the solution or if hardware is missing.
Doji
Click to expand...
Click to collapse

Unreasnbl said:
I use an app called "Spare Phone" to use the tablet as a phone. It requires you also have Google Voice .
I use earbuds for the calls.
Click to expand...
Click to collapse
Thanks Unreasnbl. That appears to be a voip solution but I am looking for native cellular voice calls. I guess I'll stick with my first gen tab for the time being.
Thanks again

Was this project never undertaken? I am also looking for a way to make phone calls that will not count towards my data (i.e., I want to use my own phone number), but so far I only see the old GTab information. Can anyone point in the right direction? I have used hangouts dialer to make calls, but it is only showing up as private, and I cannot receive calls (when they call my number it goes to voicemail immediately).

Related

2nd Line on Dash

I recently purchased an unlocked T-mobile Dash and activated it with Rogers. I got the two lines put on it(one business number, one personal number). Everything is working fine, I receive calls, txt and voice mail through both lines. Unfortunately I cannot seem to be able to make outgoing calls through the 2nd line.
I was wondering which if any of the wm6.1 firmwares or perhaps a add-on program would be able to activate the line selection on the phone. I am currently using the T-Mobile WM 6.0 firmware.
I have spent the better part of 5hours searching these forums and new firmwares but cannot find anything on the 2nd line support.
Any help is greatly appreciated.
Please any help would be appreciated. Someone must know if any of the 6.1 firmwares would have this feature enabled. I have tried looking but there nothing in the firmware notes.
I would rather not have to update one at a time.
motaguy said:
I recently purchased an unlocked T-mobile Dash and activated it with Rogers. I got the two lines put on it(one business number, one personal number). Everything is working fine, I receive calls, txt and voice mail through both lines. Unfortunately I cannot seem to be able to make outgoing calls through the 2nd line.
I was wondering which if any of the wm6.1 firmwares or perhaps a add-on program would be able to activate the line selection on the phone. I am currently using the T-Mobile WM 6.0 firmware.
I have spent the better part of 5hours searching these forums and new firmwares but cannot find anything on the 2nd line support.
Any help is greatly appreciated.
Click to expand...
Click to collapse
I have two lines but I use a dual SIM adapter which allows me to switch between the lines for outgoing calls via an interface. This may be the way you have to go as well as I do not know of any other way to do it.
Well, I finally decided to try and put the Rogers firmware on the phone, that seems to have solved the line issue. It still would be nice to know if any of the 6.1 firmwares have the line selection in the phone options.
Bupahs said:
I have two lines but I use a dual SIM adapter which allows me to switch between the lines for outgoing calls via an interface. This may be the way you have to go as well as I do not know of any other way to do it.
Click to expand...
Click to collapse
That is the most common way it is done, and it is the only way I know works for sure... So if anyone wants to do this I would recommend doing it...

[Canada] Dell voice - free VoIP with Canadian number

Have you guys used Dell Voice? Being a Canadian, Google voices limitations have left a lot to be desired, but I came across the app Dell Voice and have been using it for several days with much success. The best part... You get a free Canadian number . This alone puts it ahead of Skype.
I'm not getting voicemail notifications through it, however, but I think that's just a bug they need to fix. Audio on wifi is top notch. Haven't tried it on my regular data plan.
https://market.android.com/details?id=com.fongo.dellvoice
I've noticed a lot of negative reviews, and not experiencing the problems being reported. Battery use via wake locks is less than 0.5% according to betterbatterystats .
Share your feedback
wait so lemme get this straight, this app allows you call long distance for free???
collindubya said:
wait so lemme get this straight, this app allows you call long distance for free???
Click to expand...
Click to collapse
In Canada for free. Worldwide on paid credits... Never tried worldwide calling.
I've used this companies service before - for years, but they never had a mobile service... It use to be through PC software.
Sent from my Galaxy Nexus using Tapatalk
i see to the free calling cities, thats awesome tho, i call home to victoria from vancouver all the time.. this is wicked!
Yes I signed up for the service as well and am happy with the call quality and options. With the number option you can forward your calls to the number of dellvoice and get service without changing your number, where its difficult to get signals. would recommend this.
Just installed and tested a couple long distance calls.... Good call quality! A keeper for sure
Dell Voice kicks ass. I am going to call my provider (rogers) and drop my voice to the lowest plan the have 40min for $13 and cancel caller id and keep my 6 gig of data. Then I can use this for all of my calling. No more long distance calls and the best part is the call quality is actually good. better then I ever got through Skype. And receiving calls to your own assigned number. Only thing it is missing is SMS which they claim is in the workings and will be added in the future.
I heard about it earlier but installed today
Its working great but I am using Wifi connection at the moment
will test with 3G mobile network..
good stuff, thank you
with 6gb plan + call forwarding i can reduce my voice plan
Has anyone got this working with their bluetooth headset? It's not working at all with the blueant z9.
Sent from my Galaxy Nexus using Tapatalk
apk please??
Hey guys, got my account set up, but can someone please upload the apk?
does the voicemail work for other? on the website I get an error message whenever I got to the voicemall tab
this is awesome, thank you OP for letting us know!
Works nicely and quality is nice
Im with Virgin mobile, tried calling 3 numbers, all worked, 1 didnt, for some reason, not sure why, all local numbers. Still, love it!
I'm loving the Dell VOIP service. Since I cancelled Call Display & Voice Mail with Rogers, I now forward incoming calls to my rogers# to the Dell#, free call display and voice mail. It amazes me that Rogers gets away with charging $10+/m for it.
apk please. shows incompatible with my device on android market.
Pretty cool service considering Google Voice is technically not available to Canadians.
Anyone knows more about their future plans? Bait and switch from free to paid services? Turn off service if not well received within the next few months? etc.
I like the Dell voice.....
APK Please
Yes, This is a great App. I used it for years on computer.
Can anyone upload the Apk?
Thanks a lot.

[Q] Nexus 7 2013 with LTE and 4G

I have got the Nexus 7 2013 with LTE. I have inserted a SIM with full support for voice calls and SMS etc. However there is no default dialer application on the Nexus 7 and there is no link to dial or send SMS from the "Contacts" application.
I have read a bit and it seems that the problem is that the stock operating system and default configuration that is installed on this tablet does not see it as a "phone".
Is there a way to use this tablet as a phone with full support for phone dialer and SMS and is there a way to do this in the least invasive way so that I can return it to the shop if it does not work ?
Thanks
It seems there is a whole other thread discussing this issue.
Zilliman said:
I have got the Nexus 7 2013 with LTE. I have inserted a SIM with full support for voice calls and SMS etc. However there is no default dialer application on the Nexus 7 and there is no link to dial or send SMS from the "Contacts" application.
I have read a bit and it seems that the problem is that the stock operating system and default configuration that is installed on this tablet does not see it as a "phone".
Is there a way to use this tablet as a phone with full support for phone dialer and SMS and is there a way to do this in the least invasive way so that I can return it to the shop if it does not work ?
Thanks
Click to expand...
Click to collapse
Question...Are you rooted with the bootloader unlocked or are you just running stock? Then we can go from there,,, I got your back man! lol
thejmannnc said:
Question...Are you rooted with the bootloader unlocked or are you just running stock? Then we can go from there,,, I got your back man! lol
Click to expand...
Click to collapse
No, this is standard Nexus 7 2013 LTE from the shop. I have done NOTHING to it so far.
I have installed a few "dialer" and "SMS" applications, but there is no way I can make a voice call or send an SMS. When these applications try to make a voice call there is an error message "voice calling not supported" or "voice calling not allowed" or something similar.
There is another thread here in these forums where a few guys have tried make it dial but no luck so far.
You need a room installed with a native dialer built-in. I'm sure there are other ways but this is the easiest. I have Cm 11 4.4.2 rom installed on my nexus 7 lte and I'm able to make phone calls.
First off, do you want your tablet rooted? It's the only way I know of to allow you to make calls. If so, there's an easy way to unlock your bootloader, root, and install a recovery. But you must do this first in order for it to make calls. You can install dialers all day long but they won't do a damn thing if you're not running the correct software. Again, I'm sure there are other ways but this one is about as easy as it gets and I know it works.
Have you ever rooted a device before? If not, it's not that hard but you must follow the steps carefully. Just let me know what you wanna do and we'll go from there. I don't wanna spend the time explaining everything if you're not interested! Lol..
Sent from my Nexus 7 using XDA Premium 4 mobile app
thejmannnc said:
You need a room installed with a native dialer built-in. I'm sure there are other ways but this is the easiest. I have Cm 11 4.4.2 rom installed on my nexus 7 lte and I'm able to make phone calls.
First off, do you want your tablet rooted? It's the only way I know of to allow you to make calls. If so, there's an easy way to unlock your bootloader, root, and install a recovery. But you must do this first in order for it to make calls. You can install dialers all day long but they won't do a damn thing if you're not running the correct software. Again, I'm sure there are other ways but this one is about as easy as it gets and I know it works.
Have you ever rooted a device before? If not, it's not that hard but you must follow the steps carefully. Just let me know what you wanna do and we'll go from there. I don't wanna spend the time explaining everything if you're not interested! Lol..
Sent from my Nexus 7 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Are you saying that you have got the Nexus 7 2013 model to make ordinary voice calls? yes I am very , very interested.
So far I have tinkered with my other Android phone, I have "flushed" a new ROM on it, there is a Windows application that connects to the phone and then you can format it and then download a new ROM to it. The trickiest part was to get the USB device drivers to work right, Windows is a bit tempermental.
Given proper instructions I think I will be able to flush some other ROM onto the Nexus 7, if such a ROM already exists.
But first I would like to know that we are talking about the same thing: Nexus 7, 2013 model, with LTE. And we are talking about making and receiving normal phonecalls and SMS, using a phone's SIM - for example when someone dials my number it should ring and be able to answer the call on the NExus, like on an ordinary phone. I am *NOT* talking about making voice calls over the internet, like Viber or Skype or anything.
Edit: It seems you already said you have the Nexus 7 LTE - I presume this means Nexus 7 2013 LTE, the newest model.
I am looking forward to instructions on how to do this and be able to use my Nexus as an oversized phone!
Zilliman said:
Are you saying that you have got the Nexus 7 2013 model to make ordinary voice calls? yes I am very , very interested.
So far I have tinkered with my other Android phone, I have "flushed" a new ROM on it, there is a Windows application that connects to the phone and then you can format it and then download a new ROM to it. The trickiest part was to get the USB device drivers to work right, Windows is a bit tempermental.
Given proper instructions I think I will be able to flush some other ROM onto the Nexus 7, if such a ROM already exists.
But first I would like to know that we are talking about the same thing: Nexus 7, 2013 model, with LTE. And we are talking about making and receiving normal phonecalls and SMS, using a phone's SIM - for example when someone dials my number it should ring and be able to answer the call on the NExus, like on an ordinary phone. I am *NOT* talking about making voice calls over the internet, like Viber or Skype or anything.
Edit: It seems you already said you have the Nexus 7 LTE - I presume this means Nexus 7 2013 LTE, the newest model.
I am looking forward to instructions on how to do this and be able to use my Nexus as an oversized phone!
Click to expand...
Click to collapse
Did it work?
nixt said:
Did it work?
Click to expand...
Click to collapse
Unfortunately not. The quick summary is that out of the box the Nexus 7 2013 LTE does not have a "messaging" application or a "dialer" application, so you cannot send SMSs and you cannot make phonecalls. You can however receive SMS messages, they flash on your screen and all you can do is acknoweldge them, but there is no history, nothing.
If you download and install CM 11 or better they have enabled SMS so you have the default android SMS application and you can send and receive standard SMS messages. I was unable however to send MMS.
You can also enable SMS by doing some other tricks, modifying some framework configuration files. In both cases you need to mess with the bootloader, the recovery and so on.
The main point however is that there is no possibility so far for making or receiving phone calls. Therefore the ability to send/receive SMS is vastly irrelevant : who in their right mind sacrifices a working SIM into the Nexus just for SMS messaging? Until I can make and receice phone calls, my SIM will stay in my phone!
Zilliman said:
Unfortunately not. The quick summary is that out of the box the Nexus 7 2013 LTE does not have a "messaging" application or a "dialer" application, so you cannot send SMSs and you cannot make phonecalls. You can however receive SMS messages, they flash on your screen and all you can do is acknoweldge them, but there is no history, nothing.
If you download and install CM 11 or better they have enabled SMS so you have the default android SMS application and you can send and receive standard SMS messages. I was unable however to send MMS.
You can also enable SMS by doing some other tricks, modifying some framework configuration files. In both cases you need to mess with the bootloader, the recovery and so on.
The main point however is that there is no possibility so far for making or receiving phone calls. Therefore the ability to send/receive SMS is vastly irrelevant : who in their right mind sacrifices a working SIM into the Nexus just for SMS messaging? Until I can make and receice phone calls, my SIM will stay in my phone!
Click to expand...
Click to collapse
thx for your fast answer. im interested in buying the nexus 2013 but not sure wether the wifi or lte version. Too bad you cant phone with it
Actually I would steer clear. There are thousands of posts in various forums about the defective screen. I am 99% convinced it is bad hardware design and not random bad tablets. There are two huge issues:
1) I believe ALL the tablets have grounding issues so that the screen does not register touches properly, ie it misses touches, or it "clicks" in a different place to where you clicked etc. This happens when the tablet is not connected to the USB and when it is resting on a surface. For example this morning I was in bed and had the tablet next to me and tried to reply to a post, and I realised I had to press on each letter two or three times before it would register, it was because of this problem. This is not a "once in a thousand" miss-click issue, this is guaranteed to happen unless the tablet is held in your hands, in which case you are the "earth", or it is plugged in!
2) From Amazon reviews it seems the screen matrix is very fragile and very susceptible to tiny cracks, almost invinsible, however when it happens the screen then stops registering touches and you must replace it. It has happened to many people who claim they have not dropped it and have not mis-handled it in any way.
So I am returning mine today and will wait for a quality product like a Samsung to come to the market. In the meantime the Samsung Note 3 is smaller at 5.6", but it does have the HD resolution 1920x1080 and it is a phone!!! and it does not suffer silly quality issues like this.
Exact version of your CM 11?
thejmannnc said:
You need a room installed with a native dialer built-in. I'm sure there are other ways but this is the easiest. I have Cm 11 4.4.2 rom installed on my nexus 7 lte and I'm able to make phone calls.
First off, do you want your tablet rooted? It's the only way I know of to allow you to make calls. If so, there's an easy way to unlock your bootloader, root, and install a recovery. But you must do this first in order for it to make calls. You can install dialers all day long but they won't do a damn thing if you're not running the correct software. Again, I'm sure there are other ways but this one is about as easy as it gets and I know it works.
Have you ever rooted a device before? If not, it's not that hard but you must follow the steps carefully. Just let me know what you wanna do and we'll go from there. I don't wanna spend the time explaining everything if you're not interested! Lol..
Sent from my Nexus 7 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Hi,
I understood from your post that's possible to make GSM calls from Nexus 7 2013 LTE. If so, could you tell me the exact version of CM 11? I'm asking this because I can't make calls from my CM 11 4.4.4 snapshoot version.
Thanks for your time, Sasho.
Nexus 7c / LTE / 2013 / razorg model is a failure
stanceski said:
Hi,
I understood from your post that's possible to make GSM calls from Nexus 7 2013 LTE. If so, could you tell me the exact version of CM 11? I'm asking this because I can't make calls from my CM 11 4.4.4 snapshoot version.
Thanks for your time, Sasho.
Click to expand...
Click to collapse
Firstly making a phone call needs hardware support. They provided the SIM slot so that you could use the LTE / 4G / 3G / 2G data plan and not for making calls. (This is because the entire development team did not like using WiFi :cyclops: and thus used a second SIM card for data usage )
Anyways, now no matter which software you install, there will not be any voice calling (except Skype / Viber) for sure!
Such a waste!
d3digvijay said:
Firstly making a phone call needs hardware support. They provided the SIM slot so that you could use the LTE / 4G / 3G / 2G data plan and not for making calls. (This is because the entire development team did not like using WiFi :cyclops: and thus used a second SIM card for data usage )
Anyways, now no matter which software you install, there will not be any voice calling (except Skype / Viber) for sure!
Such a waste!
Click to expand...
Click to collapse
It's actually not quite that clear cut. Most 3G/4G (LTE) tablets have all of the hardware required to make it happen today. There have even been reports of some folks getting SMS working on certain tablets, and at least on Verizon, it's known that they block SMS/MMS and voice on tablets specifically. There just isn't that much difference between a Samsung Galaxy Tab and a Mega, for instance, except that the Tab is considered a tablet and the Mega a phone. The N7 uses a different chipset, but that chipset is also used in phones...
When VoLTE finally becomes a thing, this will get a lot more interesting. While tablets technically have the hardware to place calls and texts now, once we get VoLTE support, it's going to be a lot more obvious that it's a carrier issue.
nexus7 sms app
Hi,
I was able to make an app that can send SMS from stock android on Nexus tablets that have a SIM (still can't receive though).
No luck with GSM/USSD yet though.
I'm not able to post the Play Store link, but you can find it if you search for "Nexus7 SMS"

Samsung Smart Call

I've got unlocked Note 10+ and I flashed the U firmware because of video calling that's missing on U1. Now I found that on T Mobile version there is no Smart Call and it is replaced by T Mobile NameID, which I consider inferior and I'd have to pay for full functionality.
Anybody knows if there is any way how to get the stock Samsung dialer with Smart Call back? I'd hate to flash the U1 ROM and go through the restore process again. Even with Samsung cloud, Google and SD backups it took me almost half day to get it set as I had it before.
Stank0 said:
I've got unlocked Note 10+ and I flashed the U firmware because of video calling that's missing on U1. Now I found that on T Mobile version there is no Smart Call and it is replaced by T Mobile NameID, which I consider inferior and I'd have to pay for full functionality.
Anybody knows if there is any way how to get the stock Samsung dialer with Smart Call back? I'd hate to flash the U1 ROM and go through the restore process again. Even with Samsung cloud, Google and SD backups it took me almost half day to get it set as I had it before.
Click to expand...
Click to collapse
My past experience with Samsung Smart Call, was that i found that even though, its baked into Samsung Firmware, it is Service Provider depended. to "activate /work".
I might be wrong, but i personally believe so, based on my experience.
Just to recap, my experiences with my old Note 8 and my Note 9 (both devices not rooted)
I also flashed Stock Samsung firmware .. different CSC onto these devices.
I found on both occasions i lost the function of th Smart Call.
( Hiya services), also Volte function etc etc.
I could see the Smart Call settings in firmware, but it was greyed out.
Could not enable it at all.
When i flashed my old Samsung Firmware (Service Provider CSC) Smart Call (Hiya services), was enabled again and working.
I'm sure in your case, you'll will find it's Service Provider depended.
Good luck.
willcor said:
My past experience with Samsung Smart Call, was that i found that even though, its baked into Samsung Firmware, it is Service Provider depended. to "activate /work".
I might be wrong, but i personally believe so, based on my experience.
I'm sure in your case, you'll will find it's Service Provider depended.
Good luck.
Click to expand...
Click to collapse
The thing is, after I purchased and set up the phone on stock Samsung firmware, VoLTE and Smart Call worked perfectly fine. But stupid me wanted to try the video calling. I found that the video calling is not different than Google Duo and I will NEVER use RTT texts. I see no real advantage from using T Mo firmware in comparison with stock Samsung (provisioned for T Mo of course)
Actually quite the opposite. For me, the signal strength and battery life is practically the same on both and again, FOR ME Smart Call is much more useful than video call and RTT.
If anyone knows any benefits from keeping T Mo firmware over stock, please enlighten me. I really don't want to go through the flashing the whole thing and restoring dance again, but I'm afraid I will have to.
Stank0 said:
The thing is, after I purchased and set up the phone on stock Samsung firmware, VoLTE and Smart Call worked perfectly fine. But stupid me wanted to try the video calling. I found that the video calling is not different than Google Duo and I will NEVER use RTT texts. I see no real advantage from using T Mo firmware in comparison with stock Samsung (provisioned for T Mo of course)
Actually quite the opposite. For me, the signal strength and battery life is practically the same on both and again, FOR ME Smart Call is much more useful than video call and RTT.
If anyone knows any benefits from keeping T Mo firmware over stock, please enlighten me. I really don't want to go through the flashing the whole thing and restoring dance again, but I'm afraid I will have to.
Click to expand...
Click to collapse
Ha, your post reminds me,
that when i flashed
my branded Samsung Firmware ( Voda CSC) with the Samsung unbranded Firmware,
The reason, was also to get video calling working.
As my branded device did not have video calling option on dialer.
I could only activate video, if someone else, video called me... only then the video option, would appear.!
I then afterwards, realized that i lost my Smart Call functions. and flashed back to the branded software.
This was on my Note 9.
So i had no video call option on dialer ,but Smart Call.
Now...
again, with my branded( Voda CSC) Note 10 +,
i see that my device has video calling on dial pad.....!
So, the Service Providers, chop and changed.
A year back, they disabled video calling option, from dial pad.
Now video calling is back on the dial pad plus Smart Calls is working fine.
Good luck
So.... I bit the bullet and flashed back the U1 firmware. The only thing I lost is the video calling. I still have RTT button on my dialer. Whether it works or not I haven't tried yet. I know it wasn't there on the original dialer when I purchased the phone. Maybe because I didn't flash USERDATA? Who knows.
I'm happy I've got Smart Call back.
CSC N975U
Good afternoon, I have the n975u model, my question is what firmware should I install, to get the smart call and video calls by duo?. Or is csc the one that has these functions active?
Thanks!!
excuse my english, google translator.
I have a Verizon Note10+ running Android 11 (3.1) I paid my cell off 4 mo ago. Verizon confirmed for me that my cell is carrier unlocked. I've tried everything to get the Smart Call app on my phone to work. The only thing I haven't tried is rooting it cause I don't know how. I have 3 versions of the apk and can't make them work. Can anyone help?

LTE watch, NumberShare/NumberSync/DIGITS, and “standalone” mode

This question is for people who have an LTE watch and are using a carrier sync service like AT&T NumberShare, Verizon NumberSync, or T-Mobile DIGITS.
If you don’t have your phone with you, and your watch is connected to LTE but is in “standalone” mode rather than “remotely connected” mode, will calls and texts to your phone’s number still come through to your watch even though your watch is in standalone mode? Or is it required for your watch to be in “remotely connected” mode for calls and texts to your phone’s number to come to your watch?
Does the answer to this question change depending on whether you have a Samsung phone vs a non-Samsung phone?
The watch theoretically can receive SMS / calls independently of the phone connected remotely or not, have done myself with phone battery being dead, at times I have known it to default to the handle number allocated to the watch when initially registered, and not my main phone number, but suspect that's a glitch with my mobile operator as it has only happened a couple of times.
I don't have a Samsung phone, my phone is a 1plus 7pro 5G.
Hope this answers your question
step0011 said:
The watch theoretically can receive SMS / calls independently of the phone connected remotely or not, have done myself with phone battery being dead, at times I have known it to default to the handle number allocated to the watch when initially registered, and not my main phone number, but suspect that's a glitch with my mobile operator as it has only happened a couple of times.
I don't have a Samsung phone, my phone is a 1plus 7pro 5G.
Hope this answers your question
Click to expand...
Click to collapse
Thanks for the info!
The few times that I have used the watch without the phone, calls and text come in as if it was attached to my phone. The difference is that I am not able to reply to text. It might be because I use a pixel 3 and not a Samsung phone.
I've had a quick test with my watch with phone tuned off.
I am able to make and receive calls. I cannot receive SMS's with main number, and SMS's sent from watch are from the number originally allocated to it upon registering eSim.
I'm guessing it's using the Galaxy Wear app as a relay for the watch, on this grounds I don't think it matters what phone it's attached to, I'm assuming if you had a compatible Samsung device that supported Samsung wear nativley and it was unable to communicate with the watch, it would do the same thing.
Kind of makes sense that the watch is acting as a dumb terminal to get around the fact that only one SIM card can be registered to one phone number at any one time.
Calls must be handled by some call forwarding witchcraft at network operator end.
Hope this helps.

Categories

Resources