As you are all probably aware, the SGS2 and SGNote variants suffer from a bug that may brick your device when a certain erase method is used.
A thread with a lot of background about this issue can be found here:
Attached is a simple APK that reads out your chip's type and CID, and lets you know if we know that chip is dangerous or safe.
Just uninstall again after using.
Most SGS2's and Note's have "bad" chips (its actually the firmware that's bad). This is only dangerous if your kernel is dangerous as well. Gingerbread kernels are usually OK, Samsung ICS kernels are usually (bad on Note, good on SGS2 if released before July), custom ICS kernels: look in the kernel's thread. This is a simplification. See Entropy512's excellent post
with some further details about which kernels are what.
Obviously, this comes "as-is", we're not responsible what you do with your device, etc. No rights can be derived from the output of the program!
Internal data used:
MAG4FA, VYL00M, or KYL00M fwrev 0x12 || 0x19 --> known bad
MAG4FA, VYL00M, or KYL00M fwrev >= 0x25 --> probably safe
MAG4FA, VYL00M, or KYL00M fwrev != 0x12 && != 0x19 && < 0x25 --> probably bad
M8G2FA, MBG8FA, MCGAFA, VAL00M, VZL00M --> probably bad (mentioned in patch code)
Everything else: unknown chip
News - 08.06.2012
Samsung: "Patches will be out in form of new official ROMs and also sourcecode releases after testing, which might take some time.
05-09-2012 - v1.2
- Added chips mentioned in patch code ( http://forum.xda-developers.com/show...&postcount=785
08.06.2012 - v1.1
- fwrev 0x12 is also known bad
(v1.0: 6750; v1.1: 34315)