sine wave with MS powerpoint

Don't laugh. I am not able to draw a sine wave with MS powerpoint. I don't want to use excel for importing such a graph from math equation.  

802.11u or Passpoint

This so called 3G-WiFi auto-connect is by means of an app. It is not 802.11u, not Passpoint, not Hotspot 2.0. Still need to wait for smartphones in the mass market to support Passpoint.

WiFi 路由器速度跌咗八成

屋企隻 TP-LINK 802.11n 屋企隻 TP-LINK 802.11n 路由器速度在拾呎距離跌咗八成，所有 config 都檢查清楚正常，正想買新機之際，突然想起未 check 天線。唉，三兜天線同軸接口，有兩兜完全無扭實。唉，太疏忽了，我應否重新再考工程師牌！，所有 config 都檢查清楚正常，正想買新機之際，突然想起未 check 天線。唉，三兜天線同軸接口，有兩兜完全無扭實。唉，太疏忽了，我應否重新再考工程師牌！