I will be traveling to Thailand, Malaysia, Indonesia and Singapore and will be looking for a SIM card for my mobile phone.
Thailand is my first port of entry and basically I need to ask 2 questions here:
1 Which SIM card is the best offering cheap rates plus covering all those countries mentioned above?
2 What documents do I need to buy a SIM card in Thailand?
NB: I prefer 4G or at least 3G speeds.