I recently got a second hand iPhone 3G 8GB, and at first had some issues activating it, so I had to install Cydia. Now, every function of the iPhone works fine EXCEPT for calls and texts - which I can't make or receive. I've looked through loads of settings and stuff, and tried a lot of different things, including ultrasn0w (which doesn't seem to be working), and in settings/phone, my number is displayed as "Unknown", and when I try to set it to my number (in either +44.or 07… format), it says "Phone number could not be saved."
Any suggestions on how to fix this would be really helpful. Thanks
См. статью: How to get my iPhone 3G to recognise my phone number?