Wireless@SG and 3G

The IDA wishes to encourage more people to use the free WiFi service called Wireless@SG, so as to reduce the data load on the 3G network.  Why are people using the chargeable 3G instead of the free WiFi service? There are many WiFi hotspots, and users can save on the data charge and also get faster access.

I hardly use Wireless@SG because it is quite troublesome to login to many hotspots, especially on a mobile hone. What is your experience?