T999v no signals after root - T-Mobile, Samsung Galaxy SIII

i recently rooted my galaxy s3 T999v and after flashing the very first rom i have no signals. I have flashed another rom and still the problem persists. I know the sim and the sim card holder both work because the phone was working before the first rom was flashed. I had rooted the phone few hours earlier and the phone worked . When i flashed a rom, the phone not have any signals. Also, I can not get the google play store to work as well. I was on 4.1.1 when i rooted ans flashed a rom. this is where i got the tutorials for the root http://galaxys3root.com/galaxy-s3-r...gh-t999sgh-i747sph-l710-fail-proofnoob-proof/
ONe last thing,i tried to flash a stock rom through odin but it wont let me saying 'fail'. I did not back up initially before rooting or flash,stupid of me i know.
To all the tech geniuses out there, please help.

Can't help at all without knowing EXACTLY everything you flashed.
Sent from my SGH-T999L using xda premium

flashed a apok rom
Sent from my Galaxy Nexus using xda premium

You have maybe lost your imei code...to check if it is there go☆#0066# to see

yes it is.. how do I get it back
Sent from my Galaxy Nexus using xda premium

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Do give you a heads up you are in the non international version of the sgs 3 forum. You need to go the international forum for the s3 for help. Using our methods can damage your phone.
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