[Android Central Question]

Hello,
I have a Huawei Mate 10 Lite and I always normally use WiFi and never Mobile Data, yesterday, I topped up my data for calls and then went by the rest of the day inside, and only using WiFi, that's when I decided to check how much data has been left, it told me I only had 2 MB left, I was quite shocked and then then realised I already disabled everything
I turned off Location Services
I turned on Data Saver
I turned on to restrict Background data
When I go to Mobile Data, it has showed me that It hasn't consumed any data, it stayed at 0MB, I even set it to have a very low limit
I disabled every application from accessing my mobile data
But still, somehow, it still becomes less, why is this happening, and how can I stop it?

Other Details:
Android: 8.0.0 Oreo
Huawei Mate 10 Lite Dual SIM edition(although I am using only 1 SIM)

If you need anymore info from me, then I can give it,

[B. Diddy]

Welcome to Android Central! How much mobile data do you get on your monthly plan? Have you asked your carrier about this mobile data usage, since the phone registers no data being used?