Going to be in Mumbai in dec , for 3 days , than Bangkok , Singapore , Malaysia , would I buy a sim card in each country or would I use one
I'd go with vodafone. However, it's quite tricky to buy one in India now since the terrorist attacks - if you have a friend living here, you should ask them to buy it for you. Otherwise, you'd need some documentation like proof of address here, a copy of your passport and visa etc. Alternatively, you could buy an international calling card of some sort.
You probably will need separate sims for each country if you're not getting the calling card. hope this helps! almost 8 years ago