I have been experiencing the same problem the last few days. (mosaic internet)
1) Signal Strength is weaker than before
2) Disconnects and reconnects back again.
3) Drop in the signal strength from time to time.

Theres a Qtel survey that is ongoing, and i complained about it at that time. No results yet.

ALso the mobile network, same issues. the calls keep on disconnecting if you talk longer for 10 minutes.