[Error] Invalid calibration data in device tree & EEPROM is blank
"Invalid calibration data in device tree & eeprom is blank"
Source : GeeZuZz
Source add : http://www.hackint0sh.org/forum/showthread.php?p=81893
When a phone is unlocked (in a proper way), it will always be unlocked. Firmware upgrades never touches EEPROM, including lock data.
Here are my thought's on how iphone unlocking works - of course, it's just my thoughts based on my experience with other phones, and i may very well be wrong.
IPFS unlock solution is permanent, and will handle all future updates
Yes, i'm fairly sure that a phone unlocked with IPFS is a proper unlock (not firmware patch), making it permanent. But of course, unlike other's, iphone needs activation and IPFS therefore completely dependent on activation, which is depending on jailbreak. But when it comes to the operator lock itself, IPFS's permanently unlocks it.
I'm not sure exactly how IPFS does unlock it, but i'm feeling very sure it's one of these:
1. IPFS reads data from the baseband/EEPROM, and rebuilds the lock area in EEPROM with proper data - without any lock. This is exactly the same done on almost all other phones.
2. IPFS patches the baseband, but only as a temporary step in order to achive the above. When it's finished, it doesn't matter if the patch is removed (bb upgraded), because phone is already unlocked.
AnySIM and the other solutions are fimware patch solutions and will never survive baseband flashing/upgrade. Unlike IPFS (if IPFS also patches firmware), AnySIM patches firmware in order to bypass the lock, not in order to unlock it - or at least it's not unlocking it properly. The fact that anysim unlocked phones are bricked after upgrading, must be caused by changes the anySIM solution does to EEPROM, which is not properly done, and makes it "corrupted" as seen from the new firmware.
In my opinion there's no reason to be so negative about IPFS. They did the real unlock and so far noone have been able to recreate their solution. So don't expect a free real solution for 1.1.1 appearing very soon either. A free patch-unlock though is probably already possible now that they have decrypted the ramdisk, i will try that tomorrow. Of course iphone dev team are doing the most important work, and let's hope they soon will be able to work out a direct unlock solution as well.
"Invalid Calibration data in device tree" is growing everyday.:confused: Please make this sticky and hope there is solution for this soon.
The steps are below:
# launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
# killall -9 CommCenter
# chmod 755 swifi
by MuscleNerd, gray, and the iPhone Dev Team
Backup table checksum was corrected
Active table was restored from backup
Restore All to default settings...
After a reboot, my wifi button was no longer grey and swifi reports good tables