Help No IMEI number!! HELP!!!

[QahsiLuhgom]

Hi guys,
A week ago my sister gave me her Samsung Galaxy ace s5830i, she said that she could not call or text anyone and could not receive anything. I looked around on her phone and on the Internet to find the root of the problem. I found that the phone had no IMEI number. I typed *#06# in the keypad of the phone and a box appeared, it had the words "IMEI" but there was no number under it. When I go to settings, about phone and then status, this is what it says:
Network: T-mobile UK
Signal strength: -83 dBm 14 asu
Mobile Network type: UMTS
Service state: Out of service
Roaming: Not roaming
IMEI: Unknown
IMEI SV: 01

I just wanna tell you guys that I hardly know anything about android, so could you please explain everything simply. Thanks

 

[Guggy]

look on the back of the phone, after removing the battery

 

[QahsiLuhgom]

I know what the IMEI number is, as it is written on the box she bought it in, but it has been somehow wiped from her phone, so she can't call or text anyone, or receive calls, she can only use the Internet and download apps.

 

[iowabowtech]

I know what the IMEI number is, as it is written on the box she bought it in, but it has been somehow wiped from her phone, so she can't call or text anyone, or receive calls, she can only use the Internet and download apps.

If the issue is just that you're legit IMEI has been zero'd and you want to restore your legit IMEI, then...

http://forum.xda-developers.com/gal...ol-updated-09-06-14-efs-professional-t1308546