Query Regarding wireless internet connection.?

I am planning to buy a laptop and i have asked a few friends regarding the wireless internet connection that i can take and following are the choices that i arrived at. 1. I would need to buy a wireless router and get a WiFi connection which would work for a 50 metre radius (at my home i can use but cant go... show more I am planning to buy a laptop and i have asked a few friends regarding the wireless internet connection that i can take and following are the choices that i arrived at.
1. I would need to buy a wireless router and get a WiFi connection which would work for a 50 metre radius (at my home i can use but cant go out)
2. I have to buy a wireless internet card that reliance offers ... this is basically a card that plugs in to my laptop and i can go anywhere (and i dont know how far this is reliable).
Is there any other way to get a wireless connection ? Also, I am not able to decide which one to opt for. Any suggestions would be appreciated.
Thanks,
Sony.
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