A text message has flooded in:

Your Data Test Drive ends on 18/01/2016. You currently have 6.0GB included in your bundle and on average you have used 14.6GB a month. To avoid extra data charges and unexpected costs add 2GB UK data for £10 a month. Text 2GB to 97888 for free. To keep an eye on your data usage download the free My Vodafone app at http://vdfn.co/eq9a8

Helpful advice.