BlackBerry calls go directly to voicemail, with no Caller ID, when streaming with SlingPlayer for BlackBerry
When you're connected to your Slingbox with SlingPlayer for BlackBerry, under some circumstances when a call comes in, your phone may allow the call to go directly to voicemail without any Caller ID appearing.
This could be happening because the available network bandwidth is too low to support both voice and data transmission at the same time. The only solution is to try to find an area with better coverage.
Note: 3G cellular and Wi-Fi networks are strongly recommended for use with SlingPlayer for BlackBerry. Using EDGE networks for video streaming is not officially supported.