![Download Custom Firmware to Jailbreak and Unlock iPhone 3GS 3.1 [Mac/Windows]](https://www.ilikemyiphone.com/wp-content/uploads/2009/10/iPhone3GS_iLikeMyiPhone.jpg)
3.1
Download Custom Firmware to Jailbreak and Unlock iPhone 3GS 3.1 [Mac/Windows]
[img source : Apple.com] iPhone 3GS users can now safely update to 3.1 firmware without updating the baseband (for unlock). If you are not…