A few days ago tether stop recieving packets and I had zero internet connectivity, I tried downloading old versions for the Blackberry and pretty much everything else I could find in the support section I tried. However a developer would always say email tech support and then the person would come back and say the problem was fixed and a "fix" was never posted even though several people have this problem.
The fix I found was to edit the permissions for Tether on my blackberry to allow everything and as soon as I clicked save the internet started flowing.



Thank You for your posting, It help me. My phone done an update and I was lost for a few days.