Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not a gadget you can play with

I installed couple 3rd party applications I purchased from [...]. After installation, I rebooted the device and it never came back again. The device failed to launch the OS and the screen switching between black and hourglass for two days till now.I tried to contact rim to get help but they I cannot find their support number on their web site!This is a really bad experience for me. I have been playing with Microsoft Smarphones from Motorola and different Palm devices, and I never had such problem before.I would say the Blackberry OS needs a lot more work to make it stable.