tsim.in, 
Flights from India to Europe or America can be very long. Read the following compilation of 20 tips to make flying easier. Some items in our Free Gifts section feature in this post!
20 ways to fly like a pro
Author: Deven Verma
Thailand SIM Cards For Travelers To Thailand
Prepaid Thailand SIM cards are easily available for tourists to Thailand both at the airport as well as in town.
General Availability of Thailand SIM cards
Airport
At the airport, outside of the International gates, there are kiosks for DTAC (blue colour), AIS (Green colour) and True Move (Red colour). Try to get your SIM card in a branded store of the provider, at airports or in malls or in 7-Eleven kiosks where you pay the original price. Many independent sellers will only sell you the SIM with a surcharge like a tourist SIM of 299 THB for 399 THB.
Malaysia SIM Cards For Travelers To Malaysia
Malaysia SIM cards are easily available to tourists in Malaysia, right at the airport, but you may have to choose from a confusing array of providers.
General Availability of Malaysia SIM cards
The good news is that prepaid SIM cards are easily available in Malaysia for tourists right at the airport from an array of carriers and MVNOs. All you need is your passport and your local address.
The bad news is that the increasing number of options are confusing travelers. We hope to reduce the confusion via this post.
UK SIM cards For Travelers To The UK
UK SIM cards are easily available to tourists in the UK, with low cost calling to India. However, you may want to buy them in town rather than at the airport.
General Availability of UK SIM cards
The good news is that prepaid SIM cards are easily available for tourists, and there is no document of identity and address needed to buy them.
Where?
They are available at the airport but they are cheaper to buy from the town rather than from vending machines at the airport. In town they are available at general stores, news agents, grocery stores and even at petrol stations. Look for this image for a SIM card.
You can also order a free Pay As You Go SIM card through the internet before you arrive in the UK. Unfortunately you’ll need to provide a UK-based address for the SIM card to be sent to as SIM card providers do not ship abroad