AT&T sim unlock - Android Q&A, Help & Troubleshooting

My friend has an android att phone and whenever he puts his simcard in it it freezes his account. Is there any way to maybe unlock the phone to were it will let him use his att sim? The phone is not rooted. Any help would be well appreciated.
Thanks
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evoplug said:
My friend has an android att phone and whenever he puts his simcard in it it freezes his account. Is there any way to maybe unlock the phone to were it will let him use his att sim? The phone is not rooted. Any help would be well appreciated.
Thanks
Sent from my SPH-L720 using XDA Premium 4 mobile app
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Just to make sure I'm not missing something, your friend has an ATT phone and his account get's frozen when he tries to put in another ATT SIM or a SIM from a different carrier? If it freezes his account when putting in another ATT SIM in his ATT phone then I would recommend contacting ATT and explaining what is happening to them as that's a network operator error. If the phone freezes his account when putting in another SIM from a non ATT carrier then what you can do is ask ATT for a SIM unlock code or if you tell me what model your friends phone is there places online you can buy a SIM unlock code you can enter yourself on your friends phone. Let me know if you still have questions.

Related

How do I know if my Note is sim unlocked?

I got an ATT Note from my dad who got it from a guy off Craigslist that was using it with tmobile. I'm now trying to make it work for my girlfriends tmobile line. I flash the modems and insert her sim card but it keeps saying "insert SIM card to access network services". I assume it SIM unlocked. How can I check and make sure it is?
The SIM card is on correctly.
If its sim unlocked you dont need the tmobile radios for it to work with a tmobile line you only need to flash the radio for 3g and 4g to work. I would put in a at&t sim and see that it reads that first. If its not unlocked when you put another carriers sim in it will ask you to enter the network code. Turn the phone off and take the battery out before changing sims and make sure the connectors are not damaged that read the sim.
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I would also try going into settings/mobile networks/access point names and let it search for the network. This can take a while sometimes.
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I don't think its damaged. It was working 3 hours ago on my dads ATT line. My GF even went to Tmobile to get a new sim and now dice. I'll have to look into it.
Check the settings under the network options and give it some time. It took mine almost 3 minutes to pick up the network where I live.
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Thanks for the help. I installed the stock rom with the ICS radio and it worked. I was very surprised. The GF is happy.
Nice to hear. Gotta keep the women happy!
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[Q] using verizon s4 internationally with data

i am going to be purchasing the s4 to upgrade fro my old nexus and will be travelling to greece for 2 weeks. I have read that i will need to call verizon to unlock my phone to make calls with a local sim card from that country. But i have also read that i will need to unlock the bootloader to receive data by changing the apn settings. Please confirm if that is correct. If so can i just unlock the bootloader without having a custom rom. I dont want to install any custom roms just unlock the bootloader and run stock rom. Is this possible and can someone direct to a link for instructions. Much appreciated.
You will not need to call Verizon because your phone is sim unlocked straight out of the box. Likewise, you will not need to unlock the bootloader-aside from the developer edition there has never been any such thing as an unlocked bootloader for the Verizon Galaxy S4.
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najaboy said:
You will not need to call Verizon because your phone is sim unlocked straight out of the box. Likewise, you will not need to unlock the bootloader-aside from the developer edition there has never been any such thing as an unlocked bootloader for the Verizon Galaxy S4.
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So can i use the phone internationally with a different sim and get data as well?
gnasr74 said:
So can i use the phone internationally with a different sim and get data as well?
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Yes after you insert the proper apn.
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nicotheandroidguy said:
Yes after you insert the proper apn.
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Click to collapse
Thanks so much for the help. I assumed you had to have an unlocked bootloader to change APN settings. If i am able to change APN settings then there is no need for me to unlock the bootloader.
Thanks
gnasr74 said:
Thanks so much for the help. I assumed you had to have an unlocked bootloader to change APN settings. If i am able to change APN settings then there is no need for me to unlock the bootloader.
Thanks
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I don't know because I have the sprint version of the phone but I think you can with out Root call Verizon and ask them I had ok service with there CS I'm an ex VZW customer.
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You neither need to unlock the bootloader, nor simunlock the phone. Just insert the simcard and add apn in network setting. No need to call verizon.
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Questions and help issues go in Q&A and Help section
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confirmation
I just wanted to bring some closure to my original question since no one really comments once they get the answer to their forum question. Immediately out of the box, this phone is indeed unlocked and once you place a foreign sim card into the phone,It works immediately. Once the correct apn numbers are added, you also get data and internet. This phone is really great.
Heading to Singapore, Thailand, and Vietnam. So I just pop a Sim and ad APN? Does clicking APN give options to choose or do I have to manually set APN? Thanks in advance
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igdawgi said:
Heading to Singapore, Thailand, and Vietnam. So I just pop a Sim and ad APN? Does clicking APN give options to choose or do I have to manually set APN? Thanks in advance
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Click to collapse
You must enter the APN details manually - the phone isn't pre-configured with other carrier's APN information.
Once you've entered it, you can select the active APN from the list of entries that you've added.
If you have a Verizon SIM installed, APN editing is disabled. You'll need that non-VZ SIM if you're going to experiment.
this practice also works for trying to use a verizon GS4 on local GSM networks. Just doesnt apply to overseas so if you want to use this phone on tmobile you can do that.
Puerto Rico?
Sorry if this is not the right place for this, but does anyone know if I can use my phone in Puerto Rico?
I'm in Singapore now. It works great but their prepaid plans only support 3g; so it's petty show. The reps seem to know exactly how to program the phone and the APN info needed. $7 for 1gb and 7 days usage and the card costs $10 with a $10 credit.
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[q] help help help

I have an LG Optimus L9. I brought it brand new from T-Mobile. I now have Metro PCS and am trying to use my Meter Pcs sim card in my T-Mobile phone. The SIM Card is cut down but the phone is unlocked but i keep getting a "Your SIM Card does not allow connection to this network" error. Please help. What am i supposed to do? Thank you.
Did you set up the metropcs apn setting under mobile networks?
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You will need to register the phone on your account with metro pcs. They don't allow you to just switch the sims, the IMEI are linked to your account as well. They will charge you $15 to do this as well unless you call customer support and make a big deal of it. 1-888-8METRO8 Is the number. If it still doesn't work then you probably need to carrier unlock it, not sure if they have a free walk through here on how to do it here. Source: I work for Metro PCS. :fingers-crossed:
txtmikhail said:
Did you set up the metropcs apn setting under mobile networks?
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Click to collapse
I have. Every time i try the "Your SIM Card does not allow connection to this network" error pops up.

I9300 doesn't read sim card

Hello, I just bought samsung galaxy s3 and tryed to put in sim card, but it doesn't recognize it. I tryed to do factory reset lot of times but it doesn't helped it still writting no sim card. I tryed to put in my friends card who is in other network, so I think its not a sim slot problem. First think - it locked. Today I went to the salon of my operator and they sayed that my phone is not locked or black listed, so maybe somebody knows the solution for it ?
Really sorry for my english
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Take it back to your seller, it's faulty.
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There isn't any solution ?
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It worked for me for a while, but after one night I saw the message that phone lost my sim card and need to be rebooted
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Maybe I need to change kernel or something else ? I'm new on android and I realy need help
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Proble might be hardware: sim slot or sim card. Does your sim work on other phones? Do other sims work on your phone?
If its software, a fresh firmware flash with wipes should fix it.
I tryed to put sim to my brothers galaxy s2 and it worked, and we tryed to put other network sim to my phone and its too worked, but sim with the same carier like my didn't worked, if its a software can u give me link where I can find tutorial how to fix it ?
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Anybody ?
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Guys pls help
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Anybody have some info ?
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I've known some weird bug to happen (1 in a million or more) where a specific sim won't work on a specific phone, a friend working for movistar had that happen. Don't know why, just that sim won't work in that phone. They had to make a duplicate of the sim with a different format.
Check with your carrier to see if a different sim might work. And make sure its not a problem with the phone being locked.
Can you tell us. Is the phone 2nd hand or brand new?
I was thinking that if it is 2nd hand, maybe the previous owner flashed Custom Roms and may have damaged the 'EFS partition' when they flashed Stock firmware back onto the device before selling to you.
No, if EFS is damaged then device wouldn't log into any network.
Try to repair your device with Kies if you don't know how to use Odin:
http://forum.xda-developers.com/showthread.php?t=2088809
If it doesn't help visit your carriers store and get your SIM changed.
I tryed to put in maybe 4 cards with the same carrier and it didn't worked, yes phone is for 2nd hands :/
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I have done that thing with kies but it didn't helped :/
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Now, when you say it doesn't recognize the sim cards, do you get a "sim not inserted" message?
Or does it recognize the sim but won't allow making calls or connecting to mobile data?
You say with different carrier (your friends sim card) it works. But with your sim card and others from the same carrier it doesn't work. That sounds just like a network locked phone.
dxppxd said:
Now, when you say it doesn't recognize the sim cards, do you get a "sim not inserted" message?
Or does it recognize the sim but won't allow making calls or connecting to mobile data?
You say with different carrier (your friends sim card) it works. But with your sim card and others from the same carrier it doesn't work. That sounds just like a network locked phone.
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Click to collapse
When I turning it on it loading about minute and in that place where is network bars is pic like phone blocked I think, but after loading it shows me a perfect connection, but in my task bar writting "No SIM" and under it with lower letter "Insert SIM card". On the lock screen is too writting "No SIM card - Emergency calls only"
I know that it's sounds like network locked, but I was gone to the salon operator and they sayed me that phone is not locked, but I did not understand, or only to their network, or general. Where can check it ?
lukasrsn said:
I tryed to put sim to my brothers galaxy s2 and it worked, and we tryed to put other network sim to my phone and its too worked, but sim with the same carier like my didn't worked, if its a software can u give me link where I can find tutorial how to fix it ?
Sent from my GT-I9300 using xda app-developers app
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Click to collapse
This totally looks like a sim locked phone.
What you already know is that the phone works with your brother's sim card, so the phone works with your brother's carrier. You know it doesn't work with your sim card or any other sim card of your carrier.
But you are still not sure if it is a simlock.
Just check with a sim card from another different carrier (one that is not your carrier, nor your brother's carrier). If the phone is simlocked it shouldn't work with that 3rd carrier.
dxppxd said:
Now, when you say it doesn't recognize the sim cards, do you get a "sim not inserted" message?
Or does it recognize the sim but won't allow making calls or connecting to mobile data?
You say with different carrier (your friends sim card) it works. But with your sim card and others from the same carrier it doesn't work. That sounds just like a network locked phone.
Click to expand...
Click to collapse
paulsm said:
This totally looks like a sim locked phone.
What you already know is that the phone works with your brother's sim card, so the phone works with your brother's carrier. You know it doesn't work with your sim card or any other sim card of your carrier.
But you are still not sure if it is a simlock.
Just check with a sim card from another different carrier (one that is not your carrier, nor your brother's carrier). If the phone is simlocked it shouldn't work with that 3rd carrier.
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Yea, it worked ( but I'm not understand why my network operator sayed that it not locked ://
maybe somebody have an idea how to unlock it by my self ? I tryed: GalaxSim Unlock ; SGS Unlock Tool ; Galaxy S Unlock but no of them work in my phone, it just stuck and I need restart my phone :///

Sim App

Ok when i put a sim in my SM-N009P i get a sim app unlocking app on the phone. When i click on it, it will show three screens and then ask for a 8 digital number can anyone help on how to find the code. I got the msl number but that don't help it will give you ten chances to try at it. Can someone help. I'm at number 7 right now. The sim is a gsm card. Network unblock but sim enable. I have tried everything and some of you guys said that the sm-n900p don't have no unlocking screen but it do just put a sim in it other then a sprint sim and the app will appear. Please Help someone and don't use a sim that's all ready activated at will not show it will just say invalid sim.
Anyone?
I dont get this option, just getting the msg of invalid sim
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Well i found it somewhere dont know exactly seen this
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I am experiencing this same problem on my straight talk galaxy s3. Any suggestions?
marcion13 said:
Ok when i put a sim in my SM-N009P i get a sim app unlocking app on the phone. When i click on it, it will show three screens and then ask for a 8 digital number can anyone help on how to find the code. I got the msl number but that don't help it will give you ten chances to try at it. Can someone help. I'm at number 7 right now. The sim is a gsm card. Network unblock but sim enable. I have tried everything and some of you guys said that the sm-n900p don't have no unlocking screen but it do just put a sim in it other then a sprint sim and the app will appear. Please Help someone and don't use a sim that's all ready activated at will not show it will just say invalid sim.
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...............................................
http://idoneapps.webs.com/using-sim-unlocked-phones

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