Yep, FaceTime for iPhone 3Gs is possible thanks to the guys from iPhoneIslam. At the moment, you ( the iPhone 3Gs user ) can only transmit audio.

Probably most of you don’t have iPhoneIslam’s repo installed, so first you need to install it by searching Cydia for ‘iPhone Islam’ or add it manually : ‘’.
Now, just install the tweak, and attach a mirror on your iPhone 3Gs for a semi-full FaceTime experience.

FaceIT 3GS from iPhoneIslam on Vimeo.