My IMEI was deleted, but I wrote down the number. Can I restore it? Possible Duplicate:
  How can I restore IMEI code after factory reset?  




I have an SGS2.  During an OTA update the IMEI was deleted.  I didn't have a backup of the EFS directory, as the phone wasn't rooted.  However, I copied down the IMEI on paper beforehand.

Is there any way to restore the IMEI if I have the number?
I've a Samsung Galaxy S1, but it will probably also work for you...

What I did, I flashed a Stock ROM via ODIN with Re-Partition enabled. (Don't know if it's necesseary) The stock ROM automatically regenerated my EFS-Folder and my IMEI... (See the Thread here)

This worked for me, but this might also help you.

I don't know any way to restore your IMEI, just because you know it. (It's written behind your battery anyways) The EFS-Folder which stores the IMEI is encrypted.