If you live in the UK or USA and are traveling to thailand you will find it very expensive to use your mobile phone. A good alternation is to get a global sim for Thailand. In order for this to work you will need to have you mobile phone unlocked, this is a fairly simple process if you know how!
A global sim in Thailand is better optained prior to leaving the UK. It will set you back £19.99 and you will get £10 credit. The tru membership is £19.99 gives you 1 month access to local services. This is the best sim for thailand as it is pay as you go and not a contract sim. You can also set the tru sim for thailandto auto top up so you never run out of credit. Do keep this in mind if you loose your phone, ensuring you cancel auto top up.
Another reason why the tru sim the best sim for thailand is you get to keep your UK phone number, this saves you of having to remember more numbers. The beat kept secret of this sim card is you dont pay anything for receiving calls in thailand!