Data usage increased with same phone use??

[Hopeful-hope]

Has anyone else noticed their data usage increase in the last month or 2? Since these super cheap 40/50GB plans have come out I am getting super close to reaching my monthly data limit with no change in the way I use my phone, whereas before on 20GB I'd never get close! 

Any ideas? 

[BKNS27]

@Hopeful-hope 

I've noticed a slight increase in data usage because a few power outage in my area. It consumes data when my home wifi was out.

Other than that data usage was normal.