Singapore Airport - you need to know about
Singapore's Changi is one of the best airports in the world and offers free Internet WiFi access to everyone and it's available in all terminal buildings and departure gates. There is however a very small hurdle you have to negotiate before you can get the free access.
Foreigners transiting in Singapore will not require visas if they remain within the transit area of Changi Airport (Terminals 1, 2 and 3) and do not pass throughSingapore Immigration. ... It is advised that you check with the airline to find out if they provide the required transfer facilities and if you require a visa.
Indian passport holders can apply for a Singapore tourist visa in advance before travelling that allows a stay for maximum period of 30 days. Similar to other country rules, even for Singapore, you should ensure that your passport is valid for 6 months from the date of entry in Singapore.