Money expert Martin Lewis says mobile phone customers can save money by sending a text to a 5-digit number.

1. First, you will need to send an SMS from your BSNL Mobile Number with the text “SMS <10-digit Mobile Number>” to 1900. 2. Next, you will receive an SMS with the Unique Porting Code.

Martin Lewis says you can slash your mobile phone bills before April price hikes - and it all starts with a text to a six-digit number.

Financial guru Martin Lewis is encouraging individuals to send a text message containing a five-digit code in order to reduce their mobile phone bills.