I found that quite often, the WiFi would drop out at random times. A process of elimination narrowed it down to Bluetooth being on. If I disabled Bluetooth, the WiFi would remain rock solid.
I've not seen this with other smartphones I have owned. Obviously in hotels, there's not much I can do about this, but I wonder if others have seen it, and in terms of WiFi networks I do control, are there channels I should use in order to minimise the prospect of this interference occurring?