Yes, Galaxy Tab is fun. I just inserted GrameenPHONE sim in Galaxy Tab. It started working fine after a restart. But data connection was not working. So I called customer service. Their specialist team provided the solution. I had to configure APN manually. Once given APN as gpinternet it started working fone.
I was using Zoom Ultra from laptop. Now thinking whether that to be dropped. Because my GT connection can be shared. In fact, now it started to work as WiFi AP. I just checked one checkbox, and it started working great. I tested it from my other Nokia set and Dell laptop. As per the specification, I can use 5 devices simultaneously. Thanks Samsung for this great feature.