Using Snow Lion 10.6.8, but I guess this should be enough.Using iTunes 10.4.1, which is latest available.When following the More Information link I get to page with a checkilist. The device isn't eligible for the requested build. Trying to install it gives error note: The iPhone "Device Name" could not be restored. Btw that device has never been upgrades, since iOS 4.1 was defined as lowest supported version.įound iOS 4.2.1 restore file for iPhone4 using google. ![]() ![]() ![]() Question: How can I downgrade some device to iOS 4.2.1? Actually trying to upgrade iPhone4 running iOS4.1 to 4.2.1 using "restore" feature, if that makes any difference. No problems with iPhone3GS using iOS 4.3.5 or iPhone4 using iOS 4.1. Just got a defect report that application is crashing in iPhone3GS using iOS 4.2.1.
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