Originally Posted by Benzonat0r
Upload a file named modem.bin and paste a link here I'll make a flashable zip for you.
Nevermind, did it myself.
Im gonna try to flash the modem... i think the problem is that the stock rom is the one provided by the cell phone company and i assume it has some king of protection, and that's why no matter what modem i try to flash, baseband doesn't change.
BTW the roms in "samsung updates live" and "sammobile" for Mexico "ubamg2 tce" are the one's used by the cell phone company.
UPDATE: I flashed a moden.bin via odin, the baseband didn't change, i try to flash via CWM the modem you left, and the baseband changed for about 3 minutes "ubamg2", then it returned tu normal "ubalj7".