Chosen Solution
I repaired the charging port on my galaxy s5 & now i have no 4g the 3g is up but it doesnt pick up 4g. Im pretty sure its something i did, just wonder if someone could point me in the right direction
Chances are you knocked one of the components by the home button connector when removing it, These are extremely hard to replace if you’re not a trained professional. I’d take it to your local repair shop a see if they can fix it for you.