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Ultrasn0w
The first iPhone 3G unlock. Released on 01/01/09. [1]
Credit
geohot (injection exploit), MuscleNerd, and The dev team (payload).
Exploit
Relies on an unsigned code exploit.
The actual unlock works by a daemon patching the baseband's RAM on-the-fly, overriding the carrier lock code. It is not permanent because of the signature checks - the bootloader has to pass the sigchecks and the baseband has to pass them too, so any change to the baseband/bootloader cannot be made.
The exploit itself is a buffer overflow in the at+stkprof cmd that devteam used to patch out the carrier checks in RAM.
Source Code
The source code for yellowsn0w is now live [2]
Compatibility
| Country | Provider | yellowsn0w Version | SIM/USIM | Ingoing Calls? | Outgoing Calls? | SMS? | GPRS/EDGE? | UMTS/HSDPA? | Comments |
|---|---|---|---|---|---|---|---|---|---|
| Bermuda | Mobility | ? | SIM | No | No | No | No | No | Works for about ten minutes then "Sim Failure" occurs and yellowsn0w stops working. |
| Germany | O2 | ? | SIM | Yes | Yes | Yes | Icon shown but not tested | Icon shown but not tested | |
| Israel | IL Orange | 0.9.4 | USIM | Yes | No | Yes | Yes | Yes | Requires some tricks to get signal. While trying to place a call, signal is lost and call failed. |
Additional information: http://report.yellowsn0w.com/
