A. 1 MB of mobile roaming data (most likely on Telefonica) costs .50 Euro pence.
B. MWC 2016 had 100,000 attendees. Let’s say half of them used Android.
C. Duration of MWC was 4 days.
D. The MWC mobile app used an average of 70 MB in the background without the user knowing.
E. 71% of MWC Android users used roaming data.
The math :
B. 140 Euro x 50,000 Android attendees = 7,000,000 Euros in background-data charges!