Just joined up to make a couple of points on this thread.
Although I'm a big fan of the dedicated GPSr I have also used smartphones to assist the process for a number of years now. OS maps on a large, high resolution screen are something else.
For those that don't want a mobile phone contract, are you aware of OVIVO? They operate on the Vodafone network. You buy the SIM (£20) and that's it, you never pay anything again. Every month you get 150mins of calls, 250 texts and 500MB of data for free, which is plenty for a light user just wanting to look up geocache listings. Every month these allowances are renewed. I know it sounds too good to be true, but there you go.
I'm sure that many people are aware that
MM Tracker was available for Android. This was an unofficial app that filled the Memory Map gap on the Android platform. If you have access to Memory Map QCT maps this works beautifully with them. It was shut down by Memory Map, but you can still find the application via unofficial channels.