After 06.15.00 baseband downgrade many users receive error No Signal on iPhone 3GS or 3G so I decided to write you complete guide on how to fix No Signal on iPhone 3GS (G). Yesterday I wrote you a guide on how to downgrade 06.15.00 baseband to 05.13.04 to fix GPS and to have a possibility to unlock your iPhone using Ultrasn0w tool which is good for o5.13.04 baseband. The chance to downgrade this iPad baseband came after chance to download Redsn0w 0.9.14b1 and many iPhone users who stuck on iPad baseband started to perform this downgrade. But after downgrading process many of them received No Signal status and some other crashes after applying Ultrasn0w.
You want to fix Cydia crashes after reboot which occur all the time? You can’t launch any apps and tweaks from Cydia? That’s pretty awkward right? So what should you do to get the things fixed? Obviously it’s a jailbreak related issue and you should perform some manual work to get things back on their places.
Jay Freeman (aka Saurik) has just updated Mobile Substrate to version 0.9.3997. For those who are not aware of what that is - Mobile Substrate is a platform for many jailbreak tools such as WinterBoard, Dock2, Springtomize 2 and Five icon Dock that allow you to modify your iPhone’s appearance. Mobile Substrate works with code that allows to work with graphical extensions and Cydia as well. It’s available through Cydia and updates are completely free.