This is a known bug and is going to be fixed in the next firmware update.
There are various kinds of MMI codes which the UI needs to recognize, parse, and handle accordingly: 1) SS procedures (e.g. *43# to activate call waiting) 2) SIM control procedures (e.g. **04*...# to change the PIN code) 3) IMEI presentation procedure (*#06#) 4) Manufacturer-defined procedures (e.g. *#0000#) 5) USSD commands (operator-defined, e.g. *100# to check prepaid credit) In 1.2009.42-11, anything that fell into these categories was rejected as "Incorrect number" (which is less shameful than requesting a call be set up). PR1.1 adds *#06# and *#0000# from categories 3 and 4 but retains the old behavior for the rest. Categories 1 and 2 are to an extent configurable from the settings UI but for the 5th one (that this bug is about), there's unfortunately no support in the PR1.1 (pre-)release either. This has already been addressed internally, though, so resolved/fixed is a truthful resolution in any case...