IMO, if you want to use dongle on a regular basis then you can go for TataPhoton with a recharge of 2501, in which you will get 25 GB for a period of 180 days and before 180 days any unused balance will be carried forward, when you recharge within the active period
i dont know much about it, from their site -
"Photon Plus 15 GB Plan @ Rs 2501
15 GB internet data usage. Data Validity: 180 days
Roam free across India at no extra cost
This tariff voucher is valid as first recharge only. Regular market offers apply thereafter."
Is this what you meant? In normal recharges i only see monthly and no mention of carry forward
I think that it's the websites with regular refresh that would take up a lot of bandwidth.. e.g. google news, economictimes charts, yahoo finance etc.
I will be using Sharekhan's TT, Nest trader and NOW. Maybe Pi also sometime in future.
Yes, its only for sudden backup without browsing. Main line is mtnl which is generally reliable.
Otherwise, 25gb @ 2500 for six months = 4+gb per month with carry forward - this seems decent enough compared to others for basic regular browsing without heavy downloads. I didnt find this plan on site though.
Make sure whatever backup you use does not go down when there is no power.