Now is 512Kbps, so after upgrade is roughly 3Mbps?
But I think you'll only get faster speeds if you pay for it
right? 
haven;t say yet but it'll only roll out over the next 2 - 3
yrs..
"The upgrade will affect SingTel’s High—Speed Downlink Packet
Access or HSDPA networks, commonly known as the 3.5G mobile
telephony communications protocol."
"The new networks mean users can access internet services at
speeds of up to 40 megabits per second, allowing them to view and
share multimedia files on the move."
"SingTel said the upgrade will apply to its mobile networks in
Singapore and six other countries where it has associates."