Hello everyone, can I possibly downgrade the baseband of my iPhone 4? I am currently using my iPhone on iOS 4.2.1 and it has baseband 3.10.01. I am thinking to downgrade 3.10.01 to 01.59.00 and get an unlock with Ultrasn0w? Thanks.
Asked by: Willie from South Burlington, Vermont
Anyway, you will still be able to unlock your iPhone from its contracted mobile phone carrier using Gevey SIM Pro. But first, I would recommend you to jailbreak your iPhone using Greenpois0n in order to unleash the full potential of your iPhone by downloading and installing some jailbreak apps and tweaks that are designed to boost the performance of your iPhone. You can download Greenpois0n RC6.1 from here, and then follow this guide on how to jailbreak iOS 4.2.1 using Greenpois0n. Then once completely jailbroken, you can now unlock it with Gevey SIM Pro. The step-by-step guide on how to unlock iPhone using Gevey SIM Pro can be found on this blog post.