The factory reset appears to be the only USSD "auto dialled" code that doesn't begin with *#. Which is rather unfortunate.
Edit: Actually, the IMEI code works on the Galaxy S2 running 2.3 (just tested) but not the Galaxy S3 running 4.0. My above comment refers to the S3.
The factory reset appears to be the only USSD "auto dialled" code that doesn't begin with *#. Which is rather unfortunate.
Edit: Actually, the IMEI code works on the Galaxy S2 running 2.3 (just tested) but not the Galaxy S3 running 4.0. My above comment refers to the S3.