I have a pay-per-day mobile data service, it charges a set amount of $ if connected at least a minute until 00 am of a day.
Since I'm using Z5 (on Marsmallow and now on Nougat) it drains all my credit without being activated the mobile data. It doesn't happen to my previous phone and it's not a provider problem.
How can it be? Even if I keep my 'mobile data' icon turned off, I always receive the message 'You started to navigate, charges were applied..' from my provider. Is it using data in background and I don't notice? How I can prevent doing it?
Note: I usually don't have Wifi on nor other connection available when the charge is made.
