I hope someone here will have an answer for me on this. I went to marketplace on my dell streak and saw the game called PAINTBALL by crazysoft which was just the trial version, after trying it out I searched the preinstalled marketplace to find a way to purchase the game, but there was no purchase indications at all. I then went on-line to MOBIHAND, paid $9.95 for the full version of this game which I had sent via SMS as well as DESKTOP DOWNLOAD, after receiving this and tried downloading it on my device, I received "CONTENT NOT SUPPORTED ON THIS DEVICE". This has happened to me no matter who I purchase from or what any software I see that I'd like to have. It seems as tho this device is locked to my having to purchase through google's marketplace only and will reject any outside downloads. I contacted CRAZYSOFT and they ask that I go to settings>applications>unknown sources and uncheck this box if there. Well I did follow directions and there is no such setting on this device. So does anyone here happen to know if I'm locked into marketplace downloading only. How may I bypass this and purchase software from vendors other than google marketplace.