Changed mE mobile phone from HTC Wildfire(Android 2.2) to Sony Xperia Neo L(Ice Cream Sandwich), mE use Wifi Tethering extensively, but could not do with the new phone. Tried different options with ICS setting but nothing was useful, at last it was Aircel APN setting. Changed it and now back to work.
These are the settings, create a new APN and configure
Name Aircel Online
APN aircelgprs
MCC 404
MNC 41
These are the settings, create a new APN and configure
Name Aircel Online
APN aircelgprs
MCC 404
MNC 41
Leave all others the same.