Apple commonly locks the vintage iOS sign to ensure the range of users upgrade to the new version to restoration the mistakes, at the same time as limiting the jailbreak fame, affecting the safety of the tool. but, the organization remains permitting a few older models (inclusive of iPhone 3G, iPod touch 2 and iPad 2) to downgrade to decrease iOS versions.
STATUS SIGN IN IPSW:
iPhone:
- iPhone 3G: iOS 4.1 (8B117) – 09/03/2010; iOS 4.0.2 (8A400) – 08/09/2010; iOS 4.0.1 (8A306) – 07/13/2010; iOS 4.0 (8A293) – 06/17/2010
- iPhone 3GS: iOS 4.1 (8B117) – 09/03/2010
- iPhone 4S: iOS 6.1.3 (10B329) – 03/13/2013
iPod:
- iPod touch 2G: iOS 4.0 (8A293) – 06/17/2010; iOS 4.0.2 (8A400) – 08/09/2010; iOS 4.1 (8B117) – 09/03/2010
- iPod touch 3G: iOS 4.1 (8B117) – 09/03/2010
iPad:
- iPad 2 (WiFi): iOS 6.1.3 (10B329) – 03/13/2013
- iPad 2 (GSM): iOS 6.1.3 (10B329) – 03/13/2013
- iPad 2 (CDMA): iOS 6.1.3 (10B329) – 03/13/2013
To downgrade on the above iOS variations, you proceed immediately on iTunes or use the 3uTools software program
