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?