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Downgrade iOS 4 to OS 3.1.3/3.1.2 (iPhone, iPod Touch)

In this Guide you’ll learn how to downgrade iOS 4 firmware to OS 3.1.3 / 3.1.2 or older firmware with TinyUmbrella. This downgrade guide applies to all iPhone and iPod Touches. To downgrade iOS 4 to OS3.1.3 / 3.1.2, there’s no need to edit any Hosts file that is required in other guides found all [...]

How to Downgrade iPhone OS 3.0 to 2.2.1

As we all know that iPhone OS 3.0 has been announced and is due this Summer. Till today, Apple has release two beta(s) for iPhone OS 3.0. Both of the beta releases can be downloaded from: