Hi~ I am not sure the issue whether due to my ipad or the wifi router. The symptoms as below:

1. Ipad 4(IOS 6.0.1) connected to my home wifi(Unifi), browsing fast without any issue.
2. Ipad connected to OldTown's wifi, internet speed seem like damn slow. In the same time, my android phone connected to same Wifi and browsing fast with any issue.
3. Use my android phone as hotspot, ipad connected hotspot and browsing also slow.

Is it any bug in 6.0.1? Anyone facing the same issue?