Thing is default setting is Aircel WAP where you sms WAP to some number to get the WAP settings.
That means only browsing from phone's default browser.
If you want Java support, you should get Aircel PocketInternet settings for which you need to send the same SMS to the same number but with PI instead of WAP. I forgot the number

but maybe customer care will help you.
Once you do this, go to configuration and select the new setting as the default.
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