The O2 mobile network will deliver calls, texts and voicemail as normal so contacts won't notice anything different.

ENGADGET: O2's TU Go software spreads your phone number across multiple devices

Everson says he is concerned that many of the people who filed false claims are of "modest means" and will not be able to return the money once the government contacts them for collection, adding that the IRS will continue to examine all abnormally large refunds through its normal screening process.

FORBES: The Taxman Sueth