first of all thanks for your reply
Well i was going to combine my two internet connections. I have two ISPs subscribed and I wanted to used both ISP speed for loading websites and media quickly. One ISP gives me internet from Wifi and another ISP from Ethernet cable. Now I was thinking if it is possible to combine those connection and dispatching that connection to my home so that everybody can use my combined internet via their wifi enabled mobile , computer.
It seems to be quiet weird idea but I think it is somehow possible via raspberry pi too, as these functionality has already being developed by "Connectify" software. If everything works great then I can even create software for linux , making user to take benefits from many internet connections without having to get headache on configuring and spending days for this (Linux users).
There is one major issue preventing this kind of setup to work as you want:
With two providers you will have two different private ip addresses from which your Internet traffic is sourced.
On the Internet side they are really two different sessions and you will never be able to aggregate this traffic into one session.
You can do load sharing, you can do fail-over but you cannot do not bundling (bandwidth aggregation).
Such a setup can only work when you can bundle multiple links terminating in a single public ip address.
This implies using the same provider and needing his assistance to set up the provider-side of it.
Not many ISP's I know are willing to venture into this. They'd rather recommend you to buy a bigger link.