One way to make cheap international calls with RB-Mobile even cheaper is to ensure you use the correct international dialling codes. Then you won't waste time and money being misconnected or failing to connect at all.

If you're cheap calling with RB-Mobile from the UK, the international dialling code will start with "00" - the number which automatically routes calls overseas. It will then be followed by a number which routes your cheap call to the region, town or city that you're calling abroad.

For example, when you're making a cheap international call to Australia, you should dial '00+61' followed by the destination number. However, just like the UK - regions and cities will have their own dialling codes. So to cheap call Melbourne, Australia - the international dialling code would be 00+61+39 followed by the destination number.

Confused? Don't be. Because RB-Mobile has come to your rescue again with this cheap call guide to international dialling codes. This handy online tool means you can look up the international dialling code you need for the city you want to call.

Let's imagine you want to cheap call India. Here's how you'd use the dialling code guide to make your cheap international call:

1. Use the drop-down menu above to find the country you'd like to cheap call
2. Click on the 'Get me a rate' button
3. You will find the country code displayed with the rates and access numbers to both landlines and mobiles

Now you've got your international dialling code - and your RB-Mobile access number you're ready to make your cheap international call.