Here's a link to all the mobile devices that is supported by Slingplayer Mobile.
Unfortunately, Nokia X6 is not listed as a supported device.
As far as bandwidth requirements, Mobile Streaming requires 150 Kbps (0.1464844 Mbps) or higher
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The main issue is that the Nokia X6 Mobile device is not included in the supported Mobile devices list. This means that even though you can download and install the SPM application, it might not work properly.
This link will allow you to get the information about the supported Symbian Mobile devices.
The Slingbox Answers Forum Moderation Team.