http://uk.finance.yahoo.com/news/o2-scraps-unlimited-data-for-smartphones-ftimes-b314bb0e0808.html
"Under typical data usage, 500 megabytes amounts to watching 60 YouTube videos or looking at 5,000 web pages."
"Under typical data usage, 500 megabytes amounts to watching 60 YouTube videos or looking at 5,000 web pages."