how to call an internatinal mobile number.?

Answer 1

Enter + followed by the country code. Works anywhere. e.g. +44... for the UK.

Alternatively 00 followed by the country code, but the international access code 00 isn't right for all countries.

Answer 2

You need in this order:

International number.

Area number.
( usually you knock off the first zero or number of this particular number - dial both ways to see or ask you International Directory Services or Operator for info)

Person's number.