There are lots of mobile service providers in the world.
Here are some mobile tips for you ...
~Want to make out of coverage your phone in full network area:
Divert your calls to..
55500 -Airtel
17010 - Bsnl
~ Want to receive call from your own number:
Give a misscall to
+41445804650
Its 100% free
~ Nokia phone trick
If your nokia mobile battery is low and if you have to make emergency call or if u r in need to operate the phone..
Here is a battery backup code
This will increase the battery charge to some more.This charge is usually reserved and not shown.This will get automatically charged at the next charging...
Code is..
*3370#