Nexus one is pretty amazing phone, I have been using prepaid MTNL Trump 3G sim card on my nexus one now, initially there were some problems in activating the connection, connectivity and 3G setting. But now everything is working fine, I have been using MTNL 3G on my nexus with a maximum speed of 384 KB per second which is still much better than Egde or Gprs on my iPhone with Airtel connection.
After lot of googling I was able to use MTNL 3G on my nexus one, after some hit and trials and in the end I figured out the correct MTNL 3G settings my self as on web there is no website where the correct MTNL Trump 3G settings are posted.
In order to configure MTNL Trump 3G / GPRS / EDGE / MMS Settings on Nexus One or any other android phone – go to Settings >> Wireless & Networks >> Mobile Network Settings >> Access Point.
Now click the soft Settings button again and then select Add New APN – Give a name to these new APN Settings first and Enter the Following settings
MTNL 3G APN Settings For Delhi
PORT 9201 (for delhi )
MTNL 3G APN Settings For Mumbai
PORT 9401 (for mumbai )
Authentication Type – PAP
Now go to Settings >> Wireless & Networks >> Mobile Network Settings and then click Network Operators and select Dolphin if you are in delhi.
Note: If any of the above settings does not work Go to Dialer and dial *#*#4636#*#* and make sure that the phone connection “WCDMA Only” and NOT GSM ONLY, then you should get the signal. Still if you face problem in configuring mtnl 3G please let us know through comments.