I successfully unlocked my Samsung Galaxy S 4G. However when I insert an AT&T sim, I show full bars of signal but the screen says (No Service). I've tried two different sim cards and neither will work. They are both older sim cards but they should still work, right?
Only thing that stands out as odd is the AT&T APN isn't checked blue; it's white (unmarked?) and can't be selected. I'm using Gingerbread 2.3 and my T-Mobile card works fine. I have my network bands set to automatic.
And for the record, in order to connect to AT&T's network, I need to use the AT&T sim all the time, right? I won't be able to connect to AT&T when using the T-Mobile sim, yes?
Tmobile cam connect to AT&T only when data roaming for me if I got to arkansas... Im.at&t. But imma say to try to unlock again
Sent from my SGH-T959V using XDA App
mcbipolar said:
I successfully unlocked my Samsung Galaxy S 4G. However when I insert an AT&T sim, I show full bars of signal but the screen says (No Service). I've tried two different sim cards and neither will work. They are both older sim cards but they should still work, right?
Only thing that stands out as odd is the AT&T APN isn't checked blue; it's white (unmarked?) and can't be selected. I'm using Gingerbread 2.3 and my T-Mobile card works fine. I have my network bands set to automatic.
And for the record, in order to connect to AT&T's network, I need to use the AT&T sim all the time, right? I won't be able to connect to AT&T when using the T-Mobile sim, yes?
Click to expand...
Click to collapse
When you switch Sim cards you have to do a factory data reset. Just enter recovery and select the option to factory reset then reboot it should recognize your new Sim.
Sent from my SGH-T959V using XDA Premium App
I did a factory data reset from Settings->Privacy->Factory Data Reset and it didn't work. Still says No Service.
And I don't think I need to unlock again because when I access that one screen (I forget the code to enter) it shows all the locks as set to OFF.
Any other ideas why the AT&T SIM card won't allow my phone to connect? Is the fact that it's an old card the problem?
mcbipolar said:
I did a factory data reset from Settings->Privacy->Factory Data Reset and it didn't work. Still says No Service.
And I don't think I need to unlock again because when I access that one screen (I forget the code to enter) it shows all the locks as set to OFF.
Any other ideas why the AT&T SIM card won't allow my phone to connect? Is the fact that it's an old card the problem?
Click to expand...
Click to collapse
It could be the sim card although I really dont see how it could be. Is it a 3g sim card? If so it should still work, factory reset, input the at&t apn settings, reboot phone. That is what I would try, I have an unlocked phone as well, and once you input the unlock code, its UNLOCKED.
type in *#06# and let me know what comes up
jdubb1106 said:
type in *#06# and let me know what comes up
Click to expand...
Click to collapse
Didn't think of that, depends how it was unlocked. IMEI could be issue
mcbipolar said:
I successfully unlocked my Samsung Galaxy S 4G. However when I insert an AT&T sim, I show full bars of signal but the screen says (No Service). I've tried two different sim cards and neither will work. They are both older sim cards but they should still work, right?
Only thing that stands out as odd is the AT&T APN isn't checked blue; it's white (unmarked?) and can't be selected. I'm using Gingerbread 2.3 and my T-Mobile card works fine. I have my network bands set to automatic.
And for the record, in order to connect to AT&T's network, I need to use the AT&T sim all the time, right? I won't be able to connect to AT&T when using the T-Mobile sim, yes?
Click to expand...
Click to collapse
you would need to use your att sim card you may have a issue with the fact the sgs4g actually lacks 3g band
its hsdpa or edge or G
unless att uses the same spectrum as tmobile for hsdpa you prob will not get a signal
Thanks for the help everyone. In my newbishness, I didn't understand from the instructions on unlocking that the foreign SIM needed to be active. None of the instructions say it needs to be. That turned out to be the problem: I was using an old, inactive SIM (hence no service).
Sick as I am with T-Mobile, I just took my phone in to AT&T and switched providers yesterday.
i have a rooted Note 2 T899 (tmoblie model) i am using straight talk tmoble sim and its working fine i got an unlock code from tmoblie for my phone and it said unlock unsucessful but after restarting it no longer shows invaid sim with my new att sim card so im asuming its unlocked since it detacts and recognizes my att sim now and it shows full bars but i have no data (i have a only data plan no talk)
Ive also tried a friends verion sim and it doesnt get data either.
Any ideas how to get AT&T to work?
Thanks to this forum I've managed to Unlock my bootloader, install TWRP and flash a custom rom. Now I need to flash it to Pageplus, but I can't get The NV to write. I'm on 4.4 (thank goodness) and using DFS, and I had the QC diag drivers, but I can't get the settings to stick. Any help of what I might be doing wrong?
I just bought the sim card pack from Walmart, put in the att sim and every thing works fine.. data, text, mms etc etc...
But was it an AT&T phone or did you unlock it?
Sent from my XT1080 using XDA Free mobile app
it was a activated on Verizon originally. didn't have to unlock or do any mods.
AT&T SIM card has nothing at all to do with PagePlus.
Anyway, I found same as you on my Droid Mini, the NV_ONLY setting won't stick. I read on HoFo that others have tried and had no luck.
If you can live without data and just use text & talk, you can activate a Verizon SIM (which is really a CSIM/RUIM) with PagePlus by getting its MEID (USB SIM card reader might be required for this, but some phones can read RUIM card MEIDs) and then activating the SIM with PagePlus. You'll be able to write NAM info to the SIM, but there's no way to write data profiles, hence, no data.
There is a store down the road from me that is a Page Plus Dealer. They have flashed Droid Ultra's in their inventory, selling them for $300 data works and all. They will flash your phone for $50. But im in the same boat as you all, trying to flash my own.
Hello all.
I have received a Note 4 910v (Verizon Carrier) as gifr and the phone was factory reset and i inserted an Orange Sim From Mauritius......I got no signal bars as i inserted the sim.
The phone was on 5.0.1 and i update to 5.11 and hoped that i would be getting a network signal from it...But still nothing... I then rooted the whole phone but still nothing.
I read somewhere if i activate the phone with a verizon sim card the problem will be resolved.
If i puchase a new verizon sim card on ebay and try activating the phone without making anycalls....will it work as i wont be getting Verizon signals here in Mauritius.
I'm having problems attempting to activate my Galaxy S8+ with Verizon Prepaid. My S8+ was originally with AT&T but I have it unlocked and I have flashed the unlocked firmware to my device. I have contacted Verizon and they get to the part of activating my phone using the IMEI and the SIM card's number when they say that the IMEI isn't working for them when I give them the correct numbers but the SIM card is fine. Does anyone know whats going wrong or could help me out with this.
Activate the sim in another Verizon phone first then swap sim to s8
If this activating in another phone and switching it over doesnt work what else should i possibly do?