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Discuss Baseband? at the iPhone 4 - Hackint0sh.org; Hello, I'm new to the iPhone world, (Not the iPod world) But i'd like to ...
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    Default Baseband?

    Hello, I'm new to the iPhone world, (Not the iPod world) But i'd like to know what is the ultimate meaning of baseband?

    As in what does it mean to upgrade / downgrade the baseband, and what its purpose is.

    Thanks.



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    Red face Baseband

    "Hello, I'm new to the iPhone world, (Not the iPod world) But i'd like to know what is the ultimate meaning of baseband?

    As in what does it mean to upgrade / downgrade the baseband, and what its purpose is.

    Thanks."


    The baseband is the device in the iPhone that manages all the functions which require an antenna. The baseband processor has its own RAM and firmware in NOR flash, separate from the ARM core resources. The baseband is a resource to the OS. When Apple releases an updated iOS it will update your baseband firmware, it can either create functionality issues or prevent you from "jailbreaking" your device. You can update your iOS and keep your old baseband with certain programs like Redsn0w and iFaith. You can also re-install your previous iOS by using those programs as well, but you must save what is called "blobs" (This often also refers to the backup file with the signature ("SHSH blobs"). This signature is needed to restore a specific iOS version; it is generated by Apple based on hardware keys of the device and the hash of the firmware. Apple only issues signatures for the currently-available iOS version, which disallows installing older iOS versions. But if you have saved signatures for an older iOS version, you can use a replay attack to restore that version. Therefore it is recommended to save the signature for your device as long as Apple issues it.) You can visit this link to read up on all your questions - The iPhone Wiki - I hope this has helped

 

 

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