Here's two extra phone numbers that may help you if you're trying to cancel Sprint.

1-888-211-4727 Retention
1-407-475-6982 Judy Rathcliffe, Retention Department Supervisor

UPDATE: Judy's number no longer works.

Initially we were going to post different numbers we had found in a forum. Then, to be sure, we called them and sure enough, some of them had changed. And people say we don't fact-check, pssh.

Previously:
Defeat Sprint's Rate Hike Cancellation Lies
Oct31 Deadline For Free Sprint Contract Killing