What happens when I change carriers

[usmaak]

I have been with Verizon for 12 years but have had it with their incessant rate increases so I am moving over to T-Mobile. I am just waiting for the SIM cards to arrive. I know that carriers have their own modifications for the various android phones that they carry. I have Verizon stuff all over my phone and I know that they made modifications to call blocking to try and get customers to pay for their spam block service. When I port my phone to T-Mobile, what happens to all of that? Am I stuck with this being a Verizon phone forever?

 

[JAyshrith]

You can hoy switch carriers online or in person. Once you've activated your new service, your old account should automatically cancel, but contact your previous provider to make sure. You'll receive a final bill, which may include an early termination fee if you're required to pay one

 

[usmaak]

I am referring more to what happens to the phone. How does it get the new carrier’s software. How are updates handled. That kind of thing.