why does T-Mobile suck

If the service doesn't work where you need it...find a service that does. 

In theory, you could go to the T-Mobile store and request a ‘warranty exchange’ - this would effectively fix any actual device issue.  

In a way I am convinced that management is involved, I suspect these young people working in the Tmobile stores would be happy to just exchange the phone and move on, but, something is stopping them. In my opinion it is senior management trying to control cost without thinking about the effect it has on the companies reputation. So they tell the local store employees to try everything under the sun to avoid simply replacing a bad phone. In the world we live in today, when every company knows more about you than you know about yourself it should be easy to determine that we have never tried to scam the company out of a phone, we pay our bill on time we upgrade regularly, we just have a problem with this particular phone. We are in the words of Tmobile, "valuable customers", and yet obviously we are not valued at all. I will check into the BBB complaint thing. Thanks for the advice.

TBH, I warranty exchanged my One Plus 8 … 3x due to One Plus 'bug' introduced when they force upgraded the Android version, and effectively broke Bluetooth pairing for my vehicle.  After each one force updated, BT broke and wouldn't pair.  After the 4th, they swapped for a Samsung S21.

This was done through escalation at BBB.

I switched from at&t to tmobile seven years ago because I could not get a signal at my new home with my at*t phone. Tmobile assured me that I was within their coverage area. Nope. Received two new phones, one for me and one for the wife and from day one we've never been able to get even one bar outside or inside our home. Their solution was to send me a cell booster. The problem with that is it is connected to the Internet so if your Internet goes out (which is quite often around here) then you are just sol. The other issue is the cell booster is one big pita trying to get it back up and running after an Internet outage or a power outage. In seven years I bet I have contacted tmobile support a million times. Two days ago I contacted them again and they connected me with a "supervisor" who rather bluntly told me there's nothing they can do. Period. Hogwash!! And it's not like any of the other carriers are any better or I would have already switched. This time is different. That snotty attitude from this "supervisor" really set me off. Now watch them try to jack me up with all kinds of different "fees" when I try to switch. I just don't get it. They don't even try to be helpful or friendly. It's like having cell service through the mafia.

I been with T-Mobile for 14 years i pay my bills on time and all good, but the truth is they lie all time they promise u things and they never keep it every time u call u talk to someone ells and they lie and lie and lie, i was drooping signal in the meddle of the street and i called and called and they told me its my S23+ was bad and i had to buy a new phone so i did and got an iphone 15 pro and its the same thing bad bad bad and i keep calling and the lie keeps going and going they promised me to get this fixed and they will replace my phone and they did not and they keep with there lie and they said they going to pull the conversation and they will see what’s the promise is and get back to me and nothing happened and lie lie lie lie