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I've got a new bottom 3GS running 5.0.0 with baseband 05.16.05 that I've unlocked using the SAM method. If I back up my Lockdown folder, how can I upgrade to 5.1.1 without risking losing my unlock?

I have a Tmobile Sim that I use with SAM, but not the nonworking ATT sim that it came with.

asked 25 May '12, 18:54

ctbeiser's gravatar image


closed 26 Dec '14, 15:31

spockers's gravatar image

spockers ♦♦

The question has been closed for being "Solved" by spockers, 26 Dec '14, 15:31

No need to preserve Baseband! This method worked for me on an iPhone 4 GSM with SAM activation ticket preserved under iOS 5.0.1 and BB 04.11.08, updated to iOS 5.1.1 with BB 04.12.01 and Jailbroken with Absinthe 2.0.1, Obviously you have to start by installing SAMPrefs from the, and I used iFile and Dropbox to restore the Lockdown folder with the preserved ticket, here is what I did:

  1. Remove original carrier's SIM (or any SIM)
  2. Delete /var/root/Library/Lockdown folder with iFile
  3. Delete /User/Library/Preferences/com.bingner.sam.plist (if its there)
  4. Unzip your SAM activation ticket previously stored in Dropbox (after you click the zip file select to open with iFile)
  5. Copy ONLY the Lockdown folder to /var/root/Library (Dropbox puts it usually in /var/mobile/Documents/var/root/Library/Lockdown, depending on how you preserved your activation ticket)
  6. Reboot device
  7. Once rebooted, insert the unofficial SIM, it will say "No Network" this is OK
  8. Open SAMPrefs
  9. Check if SAMState: Loaded OK, and Disable SAM (Under Suscriber Artificial Module)
  10. The network will change to "Searching..."
  11. Enable it Again, and wait for 5 seconds
  12. Go to Utilities and press "Restore Activation" you will get an error, its OK, go back out
  13. Disable and Enable again, wait a few seconds, and if necessary repeat until signal is acquired (mine took three repetitions)
  14. Once you get the carrier signal, disable and exit SAMPrefs
  15. Congratulations you Unlocked your iPhone!!!

answered 26 May '12, 04:12

orionfrg's gravatar image


@orionfrg My only question would be, does the push certificates work? if so, how? I do not see them mentioned here.

(27 May '12, 07:12) ayzeee ayzeee's gravatar image

In my case push notifications are working normally, I have never cleared them, I only talk from my experience with my iPhone, thanks!

(27 May '12, 14:06) orionfrg orionfrg's gravatar image



answered 25 May '12, 19:43

theiphoneguy's gravatar image

theiphoneguy ♦


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answered 11 Feb '14, 21:10

DanitaFlynn's gravatar image


edited 26 Dec '14, 15:31

spockers's gravatar image

spockers ♦♦

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Asked: 25 May '12, 18:54

Seen: 8,848 times

Last updated: 26 Dec '14, 15:31

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