P.S. I'm sorry if I can't reply back right away, I'm currently doing night shifts at work and even though it's 9:45am here, it's technically my bed time, so I will get back to you as soon as I can!
Some extra information if it may help - The rom I was using that worked properly was Triune 2, I've played around with a few roms since, but the one that originally swapped my 4g to Edge was Mark of the Dragon 3.0.
Hey guys, I'm using the Galaxy S3 and my current carrier is Rogers. I've always been on 4G in the area that I'm in, and with the countless roms I've installed I've never come across any problems. Today I was trying out some new roms, but when I flashed them, I noticed that it swapped from 4G to E(aka Edge). Even if I flash back to my nandroid backup or even a fresh install if the previous rom I was using, I'm still stuck on Edge. Now even though it says I'm connected to Edge, never mind reduced speed, my internet just doesn't even work at all. For some reason even if I'm connected to wi-fi, no matter what I do it says there's no connection. I've read about flashing modems, which I have tried and it seems I'm doing it wrong? I put it on to my sd, boot in to recovery and flash it, but whenever I do I just go in to an endless boot loop. I've spent the past six hours pulling out my hair and trying to get this fixed but no solution yet, so now I've put my hope in to you guys! Any help would be appreciated!