After being forced to take the T-mobile Sim chip. My cell signal for where I live is spotty, and cuts off my calls. When I was sprint, I could walk around my house talking, and never lose signal. They say their system is better, but I beg to differ. After my plan is up, I am thinking about switching to another provider. Take something good, and mess it up by joining someone else. Very disappointed with the service I get. Compared to sprint, even if they are on the same network now. Sprint was still better, but thats just my opinion.