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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?
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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
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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.
Just bought a used Infuse, already have it rooted and running Paranoid Android Jellybean, but I'm having trouble unlocking it. All of my other phones were unlocked automatically when I flashed a custom ROM, but this doesn't seem to be the case for the Infuse. The phone won't detect my T-Mobile SIM at all, even to say "Invalid SIM" etc. Now, I know one of the first suggestions will be "reflash" but at this point I've tried 2 custom ICS ROMs, unofficial CM9, Zeus, and have flashed PA 3 times, and none of them are detecting my SIM or prompting me for the unlock code, which I've already obtained. Is there any way to force the prompt for unlock code, or some other way to enter the code, some way to do it through Odin, or using the PC...just looking for any way I can get it unlocked.
http://forum.xda-developers.com/showthread.php?t=1176886
Gilligan87 said:
All of my other phones were unlocked automatically when I flashed a custom ROM, but this doesn't seem to be the case for the Infuse.
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That's news to me. I don't think I've ever flashed a ROM that automatically SIM unlocked the phone as well.
It seems very odd that it wouldn't prompt you for the unlock code as soon as you put a foreign SIM card in it. Have you tried an actual AT&T SIM card in it just to make sure that there's not a hardware issue with the SIM card reader? Also, it may be worth going all the way back to stock and seeing if it gives the prompt.
Pony Express said:
http://forum.xda-developers.com/showthread.php?t=1176886
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Click to collapse
Like I said, I already have the unlock code. I just can't get the phone to prompt me for it. I read that thread, it's actually the one I used to obtain the code, and didn't see anything that helped with my particular dilemma.
Gilligan87 said:
Like I said, I already have the unlock code. I just can't get the phone to prompt me for it. I read that thread, it's actually the one I used to obtain the code, and didn't see anything that helped with my particular dilemma.
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I'm on the latest PA build and I was able to unlock just fine. Is it reading an AT&T sim card? First off make sure that the sim card you are using is actually activated. I just got a straight talk sim card that has not been activated and when put into my phone I was not prompted for the unlock code. I used my sister's T-Mobile sim card and it prompted for it. Make sure you swap them while the phone is powered off as well.
Sent from my SGH-I997 using xda app-developers app
mrhaddan said:
I just got a straight talk sim card that has not been activated and when put into my phone I was not prompted for the unlock code.
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Click to collapse
Unless you bought Straight Talk's T-Mobile BYOP SIM card, you wouldn't be prompted for an unlock code. Straight Talk's AT&T based SIM cards will work right off the bat, with an AT&T branded phone. When I used the hex editor method to find my unlock code, I used an old T-Mo SIM card that hadn't been active for well over a year, and I was prompted for the code as soon as I booted the phone up.
ApexPredatorBoids said:
Unless you bought Straight Talk's T-Mobile BYOP SIM card, you wouldn't be prompted for an unlock code. Straight Talk's AT&T based SIM cards will work right off the bat, with an AT&T branded phone. When I used the hex editor method to find my unlock code, I used an old T-Mo SIM card that hadn't been active for well over a year, and I was prompted for the code as soon as I booted the phone up.
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It is an at&t compatible sim card, so maybe that is why it didn't prompt, I just thought it was because it wasn't activated.
Sent from my SGH-I997 using xda app-developers app
Still baffled on this, if anyone knows how to force the unlock request screen, or some other way to unlock the phone, I would be very appreciative. Will donate for proper answer.
Gilligan87 said:
Still baffled on this, if anyone knows how to force the unlock request screen, or some other way to unlock the phone, I would be very appreciative. Will donate for proper answer.
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Click to collapse
Go to a T-Mobile store and pick up a prepaid SIM with 10 miniutes of air time. Power down your phone, and insert the SIM card. Power back on your phone, and you should be prompted for an unlock code. Your phone will be permenantly unlocked after entering the code and pressing enter.
k-semler said:
Go to a T-Mobile store and pick up a prepaid SIM with 10 miniutes of air time. Power down your phone, and insert the SIM card. Power back on your phone, and you should be prompted for an unlock code. Your phone will be permenantly unlocked after entering the code and pressing enter.
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Thanks but as I've said I've already tried the standard method.
It seems most likely that its a hardware issue; the phone isn't even reading AT&T Sims, so it might be a lost cause at this point.
Has anyone been able to do this? Activate on Sprint with just the MEID and no sim card (so you won't have LTE) and also activate on Tmo/Att/MVNO with a sim card. Is there anything in the software that allows the switching between the two - like a typical "world phone" has?
eyeballer said:
Has anyone been able to do this? Activate on Sprint with just the MEID and no sim card (so you won't have LTE) and also activate on Tmo/Att/MVNO with a sim card. Is there anything in the software that allows the switching between the two - like a typical "world phone" has?
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Registered here just to say I'm interested in the answer to this. Please post in here again if you find an answer somewhere else. Thanks!
From my activation experience you need to active the sim on sprint. And of there is no sim in the phone I couldn't make a call.
Sent from my Nexus 5 using Tapatalk
I don't think this is possible out of the box. We'll have to dig in and see what we can find for settings.
eyeballer said:
Has anyone been able to do this? Activate on Sprint with just the MEID and no sim card (so you won't have LTE) and also activate on Tmo/Att/MVNO with a sim card. Is there anything in the software that allows the switching between the two - like a typical "world phone" has?
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Click to collapse
You must have a Sim in order to activate on Sprint. I tried over the phone, chat, and self service and was unable to activate without a SIM.
hammester said:
You must have a Sim in order to activate on Sprint. I tried over the phone, chat, and self service and was unable to activate without a SIM.
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Can you remove the sim after activation? I read somewhere that someone just had 3g on Sprint with no sim, but can't find where.
eyeballer said:
Can you remove the sim after activation? I read somewhere that someone just had 3g on Sprint with no sim, but can't find where.
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I would think once you activate it you could remove the SIM and just get 3g service but I can't say that with 100% accuracy. You could give it a try using the T-mobile $3 a day plan to make sure it works that way your not out a whole month of service.
There is no "activating" on T-mobile and AT&T. The activation lies with the SIM card. I can swap out a T-mobile SIM or an AT&T SIM anytime I want.
Hi, I have the sim unlock code for my phone but when i put a different sim is not asking for the code, I tried all methods that i found on internet with not luck.
any help?
I think Verizon phones come unlocked. does it take the other sim? or is it giving you an error?
It say that the sim card is not a verizon sim card
frankcastillo said:
It say that the sim card is not a verizon sim card
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But does it get signal and make phone calls?
frankcastillo said:
It say that the sim card is not a verizon sim card
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I just swipe it away. I am on T-mobile every thing works when APN is set right.
Is working now, apn was the problem.
thanks
T Mobile on G920V
rbeavers said:
I just swipe it away. I am on T-mobile every thing works when APN is set right.
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Hey, I know this post was a year ago but I really need help getting a Verizon Galaxy S6 working on T-Mobile. I tried popping in the SIM and setting the APN but nothing is working. What APN are you using? The S6 is on 6.0.1 Marshmallow, please help!!!
http://apn-settings.com/t-mobile-apn-settings-step-by-step-configuration/
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Hello, I have a LG G4 That is set up for Verizon. Is there a way to set up the phone to use any service or does a service have to chosen first? Also, can the sim card be used for other services or will I need to get a new sim card? I want to set up the phone for a service like Tracfone? Do I have to have a sim card? Can I get a blank sim card and program it myself?
Prayerwimp said:
Hello, I have a LG G4 That is set up for Verizon. Is there a way to set up the phone to use any service or does a service have to chosen first? Also, can the sim card be used for other services or will I need to get a new sim card? I want to set up the phone for a service like Tracfone? Do I have to have a sim card? Can I get a blank sim card and program it myself?
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Click to collapse
In most cases where you intend to use a phone from one network on a different network, it typically requires a device that has been SIM/carrier unlocked.
In the case of switching from Verizon to Tracfone, you might be able to just buy a SIM and activation kit from Tracfone then use it to activate your Verizon device on the Tracfone network. You need to verify this by checking the Tracfone website or by calling Tracfone support to see if your device can be activated on the Tracfone network without SIM/carrier unlocking the device first.
Sent from my LGL84VL using Tapatalk
Droidriven said:
In most cases where you intend to use a phone from one network on a different network, it typically requires a device that has been SIM/carrier unlocked.
In the case of switching from Verizon to Tracfone, you might be able to just buy a SIM and activation kit from Tracfone then use it to activate your Verizon device on the Tracfone network. You need to verify this by checking the Tracfone website or by calling Tracfone support to see if your device can be activated on the Tracfone network without SIM/carrier unlocking the device first.
Sent from my LGL84VL using Tapatalk
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Can the phone be reformatted/reloaded/reset without any network?? So that I can choose my network at a later date. I want to remove the Verizon network from the phone.
Prayerwimp said:
Can the phone be reformatted/reloaded/reset without any network?? So that I can choose my network at a later date. I want to remove the Verizon network from the phone.
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Click to collapse
Using the device on another network doesn't involve removing anything from the device. The Verizon network is not "in your phone", your device's information is entered into the Verizon network and activated on the Verizon network.
I think you need to do some more reaearching and reading about how devices are switched from one network to another.
Sent from my LGL84VL using Tapatalk
Droidriven said:
Using the device on another network doesn't involve removing anything from the device. The Verizon network is not "in your phone", your device's information is entered into the Verizon network and activated on the Verizon network.
I think you need to do some more reaearching and reading about how devices are switched from one network to another.
Sent from my LGL84VL using Tapatalk
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Click to collapse
When I turn on the phone a Verizon splash screen comes up and then it wants me to set up the phone on the Verizon Network. I am wanting to know how to get that off the phone. Maybe it is on the sim card. I don't know allot about this.
Prayerwimp said:
When I turn on the phone a Verizon splash screen comes up and then it wants me to set up the phone on the Verizon Network. I am wanting to know how to get that off the phone. Maybe it is on the sim card. I don't know allot about this.
Click to expand...
Click to collapse
Do you have an activation kit that contains a SIM from the carrier that you want to use the device on? You can't leave the Verizon SIM in, it requires a SIM from the network that you intend to activate it on.
Call the support line for the network that you intend to activate the device on and verify with them whether or not the device you have is compatible with their network, if it can be activated on their network, they will tell you what you need.
Sent from my LGL84VL using Tapatalk
Droidriven said:
Do you have an activation kit that contains a SIM from the carrier that you want to use the device on? You can't leave the Verizon SIM in, it requires a SIM from the network that you intend to activate it on.
Sent from my LGL84VL using Tapatalk
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So, if I remove the sim the Verizon will be gone? Do I need a sim? I had a phone before that, with the help of a person on this forum, I re-installed the operating system and I did not put a network on it. I did not remove the sim and don't know if it was removable on that phone. It was a HTC one.
Prayerwimp said:
So, if I remove the sim the Verizon will be gone? Do I need a sim? I had a phone before that, with the help of a person on this forum, I re-installed the operating system and I did not put a network on it. I did not remove the sim and don't know if it was removable on that phone. It was a HTC one.
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Click to collapse
Yes, right now the device has a Verizon operating system, but the OS does not necessarily have anything to do with what network the device is used on, it can be used on another network with the OS that it currently has, sometimes, flashing a different stock firmware is part of switching networks, but is not requires on every device and not for every carrier.
Flashing the stock firmware will remove the system data that is associated to your device being activated on the Verizon network
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Droidriven said:
Yes, right now the device has a Verizon operating system, but the OS does not necessarily have anything to do with what network the device is used on, it can be used on another network with the OS that it currently has, sometimes, flashing a different stock firmware is part of switching networks, but is not requires on every device and not for every carrier.
Flashing the stock firmware will remove the system data that is associated to your device being activated on the Verizon network
Sent from my LGL84VL using Tapatalk
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When flashing the device will the sim card be flashed also? Or will I still need to get a new sim card?
Prayerwimp said:
When flashing the device will the sim card be flashed also? Or will I still need to get a new sim card?
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Click to collapse
The SIM and flashing have nothing to do with each other unless the device is being used in a different region than where it was originally sold/activated. You need to do some reading or call the support number for your carrier, you don't understand the process well enough to understand what I'm trying to tell you.
First, CALL THE CUSTOMER SUPPORT NUMBER, then verify with them whether or not your device is compatible with their network and can be activated on their network. You are wasting your time until you do that. Once they have verified that your device can be used on their network, then they can tell you how to get it activated on their network.
Don't "assume" that you can just switch to another network, make the phone call to customer support, that way you know whether or not you are wasting your time or not.
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