First:
112 is an emergency number which is used by MOST (but not all) EUROPEAN countries. It certainly doesn't work worldwide.
Second:
The 'car unlocking' thing is technically impossible and is an URBAN MYTH.
Third:
While it's just possible that one mobile manufacturer might have, at some time, built a reserve rechargeable battery into one or more of its models, the idea that typing any type of code into most phones can suddenly produce extra power is total rubbish and, again, an URBAN MYTH.
Chris



