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Anyone upgraded to 4.1 but kept existing Baseband?
- Thread starter Doctor No
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TinyUmbrella helps, but if you want to play 100% safe. Wait until the Dev Team releases the updated Pwnage Tool.
My iphone 4 is exactly the same as yours. There is no need to waste your time waiting around for PwnageTool to finally arrive.
Get tinyumbrella. Start the tss server, launch itunes, option restore to 4.1 firmware (that you've already downloaded to your computer), and let it rip.
When it's done you'll be on 4.1 / 01.59.00 JB with limera1n or greenpois0n (I've used both). Either keep your sim in or don't. Either program will hacktivate.
I've done this at least a dozen times now with the iphone 4.
Get tinyumbrella. Start the tss server, launch itunes, option restore to 4.1 firmware (that you've already downloaded to your computer), and let it rip.
When it's done you'll be on 4.1 / 01.59.00 JB with limera1n or greenpois0n (I've used both). Either keep your sim in or don't. Either program will hacktivate.
I've done this at least a dozen times now with the iphone 4.
Yes, I upgraded to 4.1 on my iPhone4 and used limera1n to jb the first weekend it was out. I used TU to backup my shsh. TU updated my host file to point to Saurik's site. My upgrade 'failed' with a 1004, baseband update failed. Running 1.59.
For saving SHSH, yes. For keeping the baseband from upgrading, no. You'll need something like pwnage.
i saved my old baseband BUT upgraded the to 4.1 and baseband got updated too ! how do i go back ... ?
Can't roll back the Baseband once updated, (except for some specific cases using Fuzzyband on a 3G)
Correct, ShSHs allow you to install older version of iOS and also "custom" packaged firmware.
I'm sure there are, however only Apple knows what the "Change log" is... so far after some testing, Saurik and dev team (and others) have report that there is not performance or anything else that "makes" the "new" baseband better.
Some people have report "less" drop calls with new baseband on iP4, but i think this is nothing else than placebo effect
You don't need your SHSH store for installing cooked firmwares as long as it's the current one.
I upgraded my iphone 4 to 4.1 but kept my baseband using Tiny Umbrella and it worked flawlessly. I'm still under att, but when it's time to get rid of the phone, i'll sell it unlocked for more money.
Not true about it needing to be a current firmware. A pwned phone does not even perform the signature check when you install a custom firmware, so you can install any custom firmware on any pwned phone regardless of SHSH status. Just stay on the jailbreak train.
ETA: Of course you can't install a firmware earlier than the one you are currently on, since downgrades can only be performed in DFU mode and that bypasses the pwned bootloader. But you could install, say, a custom 4.0 on a phone at 3.1 pwned even without saved SHSH.
Ah, yep the iboot handles the signature check so pwned phones are exempt from it. Forgot about that, thanks.