Tip & How-To about Apple iPhone Smartphone
One of the most important things that you need to do before trying to update, whether using custom or official IPSW, is to save your iDevice's SHSH blobs on Cydia's server. You should do it every time Apple releases new iOS update. That way, you are ensuring that you will be able to go back to the previous iOS version you have before updating (even if Apple stopped signing that version) and re-do the jailbreak for your iDevice. You can also downgrade to the oldest iOS version possible (e.g. from 4.1 to 3.1.2 on a 3GS) as long as you saved its SHSH on Cydia.
To save your iDevice's SHSH blobs, you need TinyUmbrella (TU):
For PC (Windows)
NOTE: Download links above are for TU v4.30.05. If TU prompts you of a new version available, please update it first.
Posted by kid_ant on
Nov 29, 2010 | Apple iPhone Smartphone
Nov 22, 2010 | Apple iPhone Smartphone
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