[Q] little complicated , I need an expert advice pls
Hi , hope u all feel good today
my problem is a little complicated so I'll try to list it in time manner :
- last year I got my AT&T I747 galaxy s3 and I really loved it.
-I wanted to use it with my T-mobile line so I rooted the device and I unlocked it .
-I used it for few months like this, then for some reason (can't remember) it started to act very strangely (Sth like Sudden Death Syndrome btw I used some android app and it showed that my device doesn't have the effected part that causes SDS ).
-I flashed custom rom (CM) using Odin and everything was wonderful.
-upgraded to CM 10.x.x(can't remember either) so far everything was just fine because I had Tmobile pay as you go line Internet was only through Wifi.
-I got new AT&T line and wanted to use the 4G Lte but it wouldn't work (neither 3g did) I didn't know why back then , I thought it was software so I flashed back to stock rom .
- 4g/3g didn't work on stock rom . I did some research and find out that IMEI could be the reason .I checked mine and it was 0 ... I looked for efs folder backup and found none .
-some idiot suggested I delete efs folder with root browser and restart the device , when I did so it showed yellow watermark with some info on it and a message says that I am on (factory mode) and the imei still 0 , no 3g/4g ... but it was still functional .
-someone also said that flashing to older stock rom could help , I did and evreything was the same (no 3g/4g , imei=0 , watermark , factory mode)
- I was about to give up then some guy from local store said he would fix it , he used some machine to erase the whole thing and rewrite it and he did now the device is working great and have 4g but with FAKE IMEI , the stock rom is getting on my nerve again .....my question is simply can I flash to CM and still have IMEI/4g ? how ? why imei was erased first time ? does the fake imei affect the phone anyway. ?
Thanks for your time and efforts .