Is there free wifi in the rooms and is it high speed?
There is wifi in every room of our Garden Resort property (not at the Wilderness). The speeds vary. But we can't claim to be high speed. But rather very standard to that found in out of Dhaka locations.
Last time I was there, there was no WiFi available in the rooms. But they do have a business center that has PCs with internet connections.
I checked their website, and they claim to have WiFi in every room now.
I think it would be best to call them up and inquire.
Get an answer from Nazimgarh Garden Resort staff and past guests.