I know a topic associated with leaving T-Mobile may not be the most popular, but it is still the reality that it happens and there hasn't been a lot of clarity on the exact process.
So in basic english:
How does termination and number porting work? For example does your old phone stop working once its ported.
Can the final bill be prorated under any circumstances? (Some report that it can be and that it cannot be done).
What charges show up on the final bill and when is it sent?
And clarification on anything else that goes on would be helpful.