Cheapest method to make calls to the UK from Borneo

[doodah]

A friend of a friend is going to Borneo for 6 weeks. Can someone please recommend the cheapest operator/method for calling back to the UK? She will be mainly in the country side so probably not near computers for Skype etc.

Thanks

 

[Zarf]

Probably buying a local PAYG sim and some prepaid international call cards.

You could also call her mobile for 3p/min using http://mymondo.co.uk/cheap-international-calls-to/malaysia.html