Hello, I just wanted to know whether Bell's ORIGINAL JB 4.1.1 firmware version is compatible with Virgin Mobile's Galaxy S3? I'm trying to downgrade to 4.1.1, but can only find Bell's 4.1.1 firmware version. I can't find virgin mobile's version anywhere. I'm guessing they were released to be compatible, but I wanted to be sure, just to avoid bricking my phone.