Poor 4G reception on TMO S7 compared to other phones -- Suggestions for fixes?

[radwolf76]

My wife got herself a 32GB T-Mobile Galaxy S7 last November, and she's noticed that she gets horrible for 4G reception compared to other, crappier phones in the household, even though we're all on the same carrier.

She's asked me to try to find any way of improving the number of bars she gets, everything from settings tweaks to flashing firmware, up to and including solutions that would require rooting. (Which is big for her, because she's normally opposed to rooting because she thinks it just invites stability problems and crashing.)

Model Number
SM-G930T

Android Version
7.0

Android Security Patch Level
April 1, 2018

Build Number
NRD90M.G930TUVS4BRC1

Kernel Version
3.18.31-12142063
[email protected] #1
Tue Mar 27 11:28:02 KST 2018

Baseband Version
G930TUVS4BRC1

 

[Sauteuse]

I have the same issue with my tmo Galaxy s7 (unlocked). I bought it as an extra phone to use on Cricket, but it is practically unusable (on Cricket using att towers). It will completely loose it's signal in a dead spot, and then refuse to reconnect when the signal returns. It's much better on tmobile (mint) but still one of the worst phones signal-wise I've experienced in years. Great phone otherwise, so would love to be able to solve this problem.