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Success, at last, got the modem working, post firmware update there was some issues with the settings, rechecked all settings, put in the required details and it worked.
The saga of getting modem to work has ended. I want to thank the following for their support :-
1. Kuduku without him this would not have been possible
2.Cisco_tech for providing good inputs and vital information
3. Varkey he was the stimulator to get me going on this journey and hand holding in getting the stuff
4. Kaneunderground : the patience and perseverance he showed on Sunday where we sat down for 7 hours to troubleshoot and get his modem running.
This post is from my 595u connected on EVDO .Success at last,
Will look at speeds and configuration settings later. Too tired as of now with the amount of time and effort spent on this.
In the end it was worth it.