I've had every galaxy s device since the s2 so you prolly remember me from the s4 forums. And I'm not stock. But my speeds weren't always like this. I believe it's on their end. I am guilty of using torrent to download Ubuntu iso. But God how long do they "throttle" people for for using that? Not to mention I thought the throttle was only when using the torrent client.
But in your situation, have you tried different browsers? How's your girlfriend's web browsing experience on the iPhone 6 compared to you using the galaxy? I highly recommend UC browser HD (not the original) even when I get crappy speeds (which is all the time at home) when I use that browser it truly feels fast!
Sent from my SM-G900T using Tapatalk
Yeah, I've tried different browsers, ROMs, etc. Loading pages isn't too slow for me, but it's mostly just any kind of apps. It's just T-Mobile to be honest. Speeds with AT&T are so much better. But I guess you get what you pay for. It's not horribly slow, but compared to AT&T, it's eh. Keep in mind I've had T-Mobile for over 5 years, had AT&T for a brief 4 months, so meh.