Thanks.
Sorry for the wrong model name.Actually its dwm 156.
The data commection is working fine in phone with aircel sim. But no help in data card still getting the same error "diap up failed".
Also as per the customer care I have updated the firmware also given at their site [link].
I have been using my dlink modem with airtel sim to access internet.But recently I'm getting the error as "Dial up failed".
I have tried some settings also for airtel
apn: airtelgprs.com
access number: *99#
username:blank
password :blank
authentication type :none
But still its not...
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