What carrier did you go with? And do u need to be rooted to do that?
I'm having the exact same issue, will drop from "LTE" to 4g and not return back to LTE. While on 4g i can't make calls, texts are slow to send, etc. Hard resets, refreshing network settings sometimes gets "LTE" back and phone is fast again, but this a temporary fix goes back to 4g again later.
I should note this all started after returning from a visit the the State, and I bought a roaming package. I wonder if it's related.
like i said send your device back and get repair. Replaced PBA and BGA failure.
a defective hardware nothing do with firmware .its been a month now my s7 running without a issue.
^^This raises a valid point. Many others in here (myself included) have already sent our devices back and had them replaced. This didn't fix the problem, but it doesn't necessarily mean that the problem isn't device related. It could be that we just got a second defective device. If Eternity4ever had their device replaced and it fixed the issue, then it seems like the problem is more likely to be device related. Most people who fix the issue by replacing their device would not come back to the forum so we just never hear of their success in fixing the issue.
I don't know about the rest of you, but I had a whole new device sent to me (NOT repaired). Maybe sending it in for a repair is the right choice after all.
I'm gonna send mine in and see what happens...