I have been searching for a reliable wireless internet connection for some time , which allows some amount of  flexibility while using it.   My requirements are simple , it should be a prepaid USB connection and should work in  Mumbai and Goa.  Since I do not view videos or download movies,  the connection should have the speed of a dialup connection at the minimum.

I have evaluated the various internet connections available and listed their features and problems:

• Airtel USB Modem :  Costs  Rs 2999, can be purchased through Indiatimes,  tariff  starts from 20 paise / 50 KB download (or Rs 4 / MB download) ,  Rs 349 for 500 MB free data usage,  1 month validity. However, there is no information on  how you are going to charge /load the amount for the prepaid usage. Seller B.T. Agencies has no feedback on Indiatimes
• Idea Netsetter : Costs Rs 2490 ,  Minimum prepaid  amount is  Rs 150,  Access charges are  Rs 1.7 / MB  ( from http://www.ideacellular.com/IDEA.portal?_nfpb=true&_pageLabel=IDEA_Page_Advertisements&displayParam=NetSetterPostpaid/NetSetterUSBModem_DELHI.html) . However some users have found the speed of an Idea connection slow.
• Vlink USB modem :  Starter kit is the cheapest at Rs 99 ( but should be used with a mobile phone) ,  data charges  60 paise / minute.   However, the terms for their Rs 349 and Rs 801 recharge at their website are confusing and this connection does not offer the coverage I want.
  http://www.virginmobile.in/plan_special_offers_vlink-usb.html

Reliance Netconnect seems to be a data card. I will also check forums and list the feedback from users , so that this review is comprehensive.