I think you may be right. But i dont think it has to do with 4g. I live in puerto Rico and about 4 months ago i can recall having issues with my TP and it turned out there were issues with a nearby tower.
I have been looking at the signal and noticed it was on 1x and before that it was on EV. It just switched back to EV about 30 minutes now and has remained stable so far. I think its a sprint tower issue.
I just got worried since it happened a bit after the removals.
I think it'll be fine
Thanks