Was playing around so if old news my apologies.

 

On decoder use to go "Schedule information is not available for this time period" at around 8 days.

 

Was just hitting blue button to advance days and got up to Mon 02 Sept before got that message.

 

After about a week ahead it comes up program unavailable but if wait a couple seconds the Sky owned channels change to what's on if decoder connected to internet.

 

 

 

Been able to do on Sky applics for a while, but this is the first time noticed it working on decoder.

 

Did test on second decoder which is not connected to internet, could go past first week, but program not available remained, looks like after one week info comes from internet. 

 

Limitations seem to be search guide will only look one week ahead, and has to be in grid view, won't work in channel view.