HOW TO Restore iPhone 3Gs (new iboot rom) From Firmware 3.1.2 to 3.1.2

**kaursan** · 03-09-2010 07:36 PM

Hi,

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?

Many thanks

PS: I had this message on cydia : "This device has a 3.1.3 ECID SHSH on file"

**Olethros** · 03-09-2010 07:50 PM

Originally Posted by kaursan

Hi,

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?

Many thanks

PS: I had this message on cydia : "This device has a 3.1.3 ECID SHSH on file"

Your only option is to restore 3.1.3 from apple. You will lose jailbreak (until a new jailbreak is released) and unlock (don't know if you require unlock).