I've used a mix of two howtos: Jason's and alex's. With the second we have the advantage of being able to debug. I'll mostly just copy both below (and simplify alex's): Update Jan 2012: this still works on SDK 4.2.1 and iOS 5.0.1 - I've just tested it all on a new computer and device! 1. Create Self-Signed Certificate Patch your iPhone SDK to allow the use of this certificate: Launch Keychain Acce