Sprint will now reimburse 100% of your cancellation fees when you switch carriers
Here is how the process works. You bring your number into Sprint with your ETF fee or the balance for your equipment installment plan. Next, you purchase a phone using Sprint Easy Pay, the iPhone for Life Plan, or Sprint Lease. You can also dig deep into your pockets and pay full retail price for a brand new handset. Go online to www.sprint.com/joinsprint and upload a bill that shows applicable charges for reimbursement within 60 days of activation.
Now, all that is required is for you to hand over to Sprint the phone associated with the account you are closing. You will receive a free pre-paid mailer for the task. The phone must be in good working condition. The fees will be reimbursed in the form of an American Express Reward Card.
If T-Mobile hasn't yet passed Sprint for the third spot among the nation's top four carriers, it should soon. And that puts Sprint in desperation mode as it tries to recover some long-lost momentum.
source: Sprint via AndroidAuthority