I've just got back from a month away, where I used my iPhone extensively in a range of locations. A lot of the time I left Bluetooth on, because I have a Bluetooth keyboard which I use for serious data entry.

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?