I have two iPhones. For years our usage has been around 500MB. The last two months we have been changed double that. Nothing has changed. Same phones, same service, same habits.
There are many posts here about unusual data usage with no useful explanations offered. It would be nice to know definitively what is going on. Apparently most people don't care and just pay it. Ting's reputation would increase significantly of they would contribute something helpful here.