Please go to your graph showing “mobile” data only, then go to the bottom right three line GlassWire menu and choose “send feedback” with details on what’s wrong with the counting. This should auto-populate an email with our email address.
Please also include a screenshot of what your mobile provider shows if possible and make sure the same date/time is selected and is visible in both screenshots.
Please also consider looking at Android’s data usage figures in settings and include a screenshot there too if possible.
Thanks for your help and sorry for the issue. We use the phone’s actual data API that’s built in but we found that some phones have a bug with the Android OS itself that has wrong data but I haven’t seen this yet with OnePlus phones, only Samsung.