Checking through Glasswire application, Android system has the highest data usage everyday on my Android. I only used my phone for tethering to my laptop and it don't take that much of data (My laptop only has Glasswire apps so I can check).
I have searched through the internet and most of them said you should restrict background data. However, if I set it, I won't receive notification from my instant messaging app.
Also, it seems weird that the upload data usage take more than 100 MB. I realize I even didn't upload too much things.
Are there any solution?