[Q][Help]My GS3 i9300 Doesn't read sim cards - Galaxy S III Q&A, Help & Troubleshooting

Hello guys, i don't know if this has been already answered, if so link me please.
So i rooted my GS3(Unlocked no carrier) and installed a moded rom(a carrier one Telcel Mexico to be more specific) and it reads the sim cards in Mexico, but i moved back to USA and it doesn't read my T-Mobile sim card
what do i do?

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[Q] Only emergency calls (only in my main company)

Hello, I just got the Only Emergency Calls nightmare .
I live in Mexico and I'm a Movistar user, but today I burrowed a friend's SIM from another company (Telcel), I switched and my GS2 magically got service!
Buuuuutttt!!!! I switched back to Movistar and again no service
I Checked my IMEI and the one printed on my phone is the same on de about section.
I haven't touch the EFs folders.
I tried with different ROMs, Modems and Kernels.
I've used CWM and Odin.
Does anyone can help me to solve this situation, please??
Thank you in advanced!
Ask your network first and ask them to give you a new sim card .
jje
sim card gone ,take new one....
Thank you guys
Wow you are amazing!! I just got new card . Thank you for your help!

[Q] IMEI null/null HELP PLEASE

Hello, I recently bought a T-Mobile Samsung Galaxy S 2 off of ebay, I put in my sim card and it doesn't read it. Originally i thought it was a hardware problem but when i typed *#06# It said IMEI Null/Null. Is there anyway i can possibly get this removed so I can use the phone? It is not rooted but I am willing to root it if it is needed to fix the problem, Thanks
WamBamSam21 said:
Hello, I recently bought a T-Mobile Samsung Galaxy S 2 off of ebay, I put in my sim card and it doesn't read it. Originally i thought it was a hardware problem but when i typed *#06# It said IMEI Null/Null. Is there anyway i can possibly get this removed so I can use the phone? It is not rooted but I am willing to root it if it is needed to fix the problem, Thanks
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T-mobile USA, or T-mobile Europe? They have different models.
You're in the right place for T-mobile Europe.
T-mobile USA's phone is different, and has a separate forum here: http://forum.xda-developers.com/forumdisplay.php?f=1329

[Q] QUESTION : Can i unlock a KOREAN phone that does not have any sim card slot?

Hey guys. Quick question for you. if anhone know that would be great. I bougth a phone ( SKY IM A780 L ) from someone in Europe. the phone is from korea. the phone does not have a slot for a sim card. is there a way to unlock it anyway, to be able to put a provider from my country? ( canada )
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Unlock S9+ Dual sim

Hello,
I'm from Portugal, and i have a samsung galaxy s9 plus dual sim.
Now im using just one sim card and one micro sd, I have two imei. If i unlock my phone i give us what imei?
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If your phone is Dual SIM, you might have issues unlocking it.
Talk first with your carrier and ask them to unlock your phone.

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