first you much have
1.itunes(you can download for www.apple.com)
2.create account(id apple) in apple store(use itunes)
3.if you want create free account(don't have credit card)click the software or game free than you can create no credit card account.
other choice
-download 越狱工具Spirit(http://spiritjb.com/)
What's Spirit? 什么是Spirit?
- Spirit是一个完美越狱,适用于iPad、以及最新固件的iPhone和iPod touch。
- Spirit不能解锁
download all software and game is free..