Changing imei

Hi,

i have a w810i that was originaly from T-movil. It was unlocked by changing the imei (that was before i had it) so now I can't flash it. I want to know if it's possible to revert the process. my phone is a cid 50 and db201x and to my knowlege those are a little difficult to mod.

I will apreciate any help in may case, thankyou.

the phone wasn't unlock by changing the imei, the phone wouldn't work if the imei was changed in the gdfs, you should be able to flash it try xs++3.1 or setool2 lite 1.11.

Changing IMEI numbers is illegal. But it doesn't matter in any countries.
And you cannot downgrade CID 50 to CID 49.