I have the $9.99 plan from TMo. I can access ssh ports, update OMWeather, etc. Seems open to most ports I have tried. The only way to get the $4.99 is to be grandfathered in. It's not offered anymore. I had that plan until last month. Then I "upgraded" to use MyFaves and was told the $4.99 plan was incompatible (...line of BS...). In a previous post, I noted that if TMo can figure out your phone's make, they will deny you access to the $9.99 plan if you have a "dataphone". Then your only choice is the $24.99 plans and up. Currently, my N900 is flying under the radar.