I operate a cyber cafe in ibadan oyo state and connect to the ipnxnigeria networks which used to be very fast. But for sometime now there service has been really frustrating and inconsistent so i'm thinking of changing to a better and more reliable ISP (more preferably wireless broadband connection)

I need reasonable suggestions and recommendations from people for a very good, reliable and cost effective ISP.

Solid Proof on recommended ISP will be appreciated