How hard is it for a non-tech person to switch to TMobile home internet?

I was in relatively the same boat as you. My setup was a nightmare and half of that was dealing with the inexperienced and just insanely stupid questions the "tech support" asked and asked me to do.  Short story, 2 gateways, 5 days and countless hour long calls and i have to return everything because their service does NOT have coverage in my area despite all the testimonials from tmobile to the contrary. Tech support would be better if they bothered to actually LISTEN. example from first day: I am asked for the imei which i provide. They half listen and ask for it again. I provide again. The next day back with tech support. Same person. Who again asks for imei. I provide it a third time and support says its not right. Not what was on their records. Why didnt you say that yesterday? They put customers through so many hoops including having me buy a new sim card at a tmobile retailer as the sim provided wasnt reading . I try that and no dice. They have me opening the gateway and checking the pre installed sim, then doing it again and describe step by step what I am doing. I told them I wanted assurances me opening up the gateway wouldnt void my warrant. I got no such assurance  so I try everything I can for days and all I get is "sorry for the inconvenience". By this point inconvenience was about 4 days ago. After 8 years i think I am finally ready to look for a new carrier.