More Details http://telecomtalk.info/aircel-kolkata-3g-service-speed-test-and-review/57816/
1. Your Aircel 2G mobile no is not automatically registered to Aircel 3G network
2. After sending START 3G to 121, my Aircel mobile can able to connect to Aircel 3G network.
3. The smartphone I used supports upto 3.6Mbps HSDPA - speedtest
4. Network is quite stable for sub-urban area, full HSPA network!
5. With Modem supporting upto 7.2Mbps HSPA - [APN aircelweb ]
On Delhi Server: