Leaving T-Mobile

I became a T-Mobile customer several years ago. I tried to get a new device I was asked for a down payment. That’s fine I had no problem I couldn’t pay it though. I was told after a couple of years they would be able to stop requiring the down payment. Been there for like 4-5 yrs and still the same. I went to another carrier and I was able to get two new devices without a down payment. It’s too bad cause I really enjoyed their customer service they’ve been awesome.