I get wireless, 3G and 2G network connection via my iPhone. I tested the network speed of a wireless, 3G and 2G network possible from my iPhone using the App from OFCA.
Wifi of sMobileNet network in HKUST: 25604 kbps:
3G network from a carrier in Hong Kong: 2776 kbps:
2G network from a carrier in Hong Kong: 169 kbps:
If we consider the speed of 2G network as 1X. Then the relative speed for Wifi, 3G and 2G networks are: