This is one offer she's seen:
http://www.argos.co.uk/static/Produc...ext%3E5230.htm
She's more interested in walking/cycling than driving so if it works well for that, great! So although it's not clear from the advert, I presume the above offer provides the sat nav application on the phone but not necessarily any maps. Are these hard to download? Do you need to buy a USB cable or could it be done via the memory card? We're both novices when it comes to mobile phones, apps, downloads etc. so keep it simple for us...