Burnsy2023

Linux isn't really any more stable or secure than Windows now. Both are very stable and although they have different attack vectors, they aren't really any more secure than one another.

Make sure you update it to Gingerbread, it does wonders for battery life.

A couple of things: 802.11a also broadcasts on 5Ghz. Secondly, unless you have a VERY old phone, it won't be on the 2.4Ghz frequency and therefore won't interfere. All DECT phones use different frequencies to WIFI. Lastly, the easiest and most efficient way to get a better signal is to make sure you're on the best WIFI channel for your area. If you go into your router config, you can usually see what channel other networks are on, ideally you want to be on your own channel with as much space between you and the next network.