HOW TO Restore iPhone 3Gs (new iboot rom) From Firmware 3.1.2 to 3.1.2
I have 3GS iPhone with 3.1.2 firmware (Original OS when bought), 05.11.07 baseband and serial 87947Wxxxx (new iboot rom) ... This iphone was successfully Jaillbreaked with Blackra1n RC3.
Currently this iphone does not work well (unexpectedly : wifi deactivated, edge problem, boot loop mode...). I want to reinstall its firmware with apple or customized firmware iPhone2,1_3.1.2_7D11.ipsw. Is it possible now? How?
PS: I had this message on cydia : "This device has a 3.1.3 ECID SHSH on file"