Calling internationally from India to the United Kingdom is simple but can add up on a cell or home phone bill. Before calling the UK from India you must make sure you have international calling on your phone to complete the call. You also need the UK mobile number you are trying to reach. It is easiest to call these numbers from a touch-tone phone, but other phones work as well.
Dial "00" to call to countries outside of India. This is the international calling code.
Dial "44" to call the United Kingdom. This is the international code assigned to the UK.
Dial "20" to call London and any other cities and towns within England. (There are different codes for Scotland, Ireland and Northern Ireland.)
Dial the mobile number you are calling. This will be specific to whomever you are calling.