iPhone 3gs 4.0.1 w/ firmware 05.13.04 Jailbreak/Unlock to sell
This is my first post, and I did my best at reading several threads to find an answer that I can understand but wasn't successful. I would greatly appreciate some advice on the best process for jailbreaking, unlocking, backing up, and cleaning my iPhone for resale purposes so I can buy a new one. I am not sure of what is all involved, so please be thorough on all the best practices that I should proceed with.
As of now, my phone is not jailbroken or unlocked. It is a 3gs 4.0.1 and the modem firmware is 05.13.04. Please let me know what other information is needed. Thanks for any help you guys can provide, and I apologize if this has been answered already but I had trouble finding it.