wi-fi network

i am from Bangladesh and i want to provide Wi-Fi service in my city. its means my client use internet via wireless LAN card.is it prosiable to use mikrotik wireless device.any one help me plzzzzzz

yes, it’s possible. see list of products:

http://www.routerboard.com/pricelist.php

you will need a range of APs distributed around your city. if clients will be end users with laptops, the range of their wireless cards is usually 200-300m, so your APs should cover the city with this kind of grid