Help with jailbreaking and Cydia for iPhones, iPads, and iPod touches.

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How to fix some mysterious problems.

Does SAM work on iPhone 4? Do I have to use it? I already activate it using redsn0w 0.9.6rc8 (didn't show "deactivate" option) and the device work fine, no battery drainage or anything and work fine on iTune. By the way my device on iOS 4.2.1 and BB 03.10.01 and it is locked with no sim on it?

another thing, when iOS 4.3 coming up and I want to restore my current firmware (4.2.1) using restore option on iTune and 4.2.1 ipsw file, does the Baseband upgrade to the newer on? I mean is the Baseband upgrade included on the ipsw file or it is done through apple servers?

Thanks in advance

asked 13 Feb '11, 06:05

AbuGe0rge's gravatar image


edited 14 Feb '11, 00:25

gomanski's gravatar image


SAM is for custom activation. It is only needed if you don't use original carrier to fix push notifications and FaceTime.

Yes, the baseband is included in the ipsw. To protect your baseband from changing, you need either a custom ipsw, or TinyUmbrella-protection (only iPhone 4).

To be able to reinstall 4.2.1 when 4.3 is out, you need SHSH backup of 4.2.1. Make sure you get your SHSH backup (with TinyUmbrella) now while you can still get it. As soon as 4.3 comes out, it's too late.


answered 13 Feb '11, 07:06

http's gravatar image

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Thank you very much for your help

what I understand that SAM don't work on iPhone 4 or at least until the unlock is released and I will see what happened because I am not using original sim.

And if I restore my device now to iOS 4.2.1 (current one on my device), it will not upgrade my baseband (03.10.01) but when 4.3 is out it will and I have to preserve it with TinyUmbrella.

I already saved my SHSH blob using cydia.

(13 Feb '11, 11:46) AbuGe0rge AbuGe0rge's gravatar image
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Asked: 13 Feb '11, 06:05

Seen: 2,870 times

Last updated: 14 Feb '11, 00:25

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