Official USSD hack list of immune and unsafe ROMs This will be the official list for ROM's and browsers affected by the USDD code issue and instructions on how to patch it til an official fix is released. Please follow the following steps; Visit the following link using your phones browser USDD test page If your MEID info is shown on the screen then the ROM you are using is affected! Download and install TelStop from the Play Store. After you install the TelStop app visit the test page again. You should now get a "Complete action using" popup with TelStop listed. Select TelStop. You will then receive a warning that this is likely a malicious code. If your MEID info is not displayed then you are fine. Report What ROM and browser you used and what your results were. Source- PCWorld Affected ROMs (I'm thinking all ICS and older based ROMs are most likely affected unless they are patched) Stock 2.3 (all releases, all phones) CM7 Imperium Initiative peetr's Hybrid MOF.2.3.5.ish CM9 Unaffected ROMs Th3Bill's Jellybean based ROMs (thanks Th3Bill for getting back to me so quick) Affected Browsers Stock Firefox Opera Mini Maxthon Safe Browsers Opera Mobile gives prompt "Loading of external frame source tel:*%2306%23 suppressed (click to view)"