How to use two mobile internet connections simultaneously

[Nadeem Shaikh]

Hello Guys,
I am having this airtel internet connection which is working perfectly.
Actually my brother is also using the same connections.
So I was just thinking of connecting both of them to same PC so that there will be an increase in the speed.
However there is no visible increase,Also only one connection is being used at a time whereas the other is Idle though both r connected.
Can any one tell me how to use both of them simultaneously ?
The OS i m using is Windows XP

[Choto Cheeta]

Bridging is not supported by AirTel Mobile office I suppose hence I doubt, it wont be possible

[Nadeem Shaikh]

Though two of them r connected one seems to be idle at a time.
Bye the way wht u call BRIDGING how is it done.

[Choto Cheeta]

^^^

OS will detect Both Devices as internet getway, by default OS would select the default / primary connection as your internet getway, a system may have 2 live getway however it can only use one at a time unless it creates a bridge between them to divert traffic load between them a using load balance !!!

However as per my knowledge at domestic segment, by default only BSNL ISDN comes with bridging support where 2 ISDN connection can be bridged