Hi all, I'm having problem with my new Mi4 LTE. From two days ago all of sudden I got big battery drain. Then I didn't realized that this is (IMO) form mobile data usage until I got message from my provider that I used all of my data volume. Yesterday and today I watched my mobile data usage and in afternoon it started again. In these three days I lost about 3 GB. Most of the day it is OK, and then all of sudden it begins to transfer something. Mi Account is set to sync WLAN only. Yesterday when I noticed it that it started again I tried to reboot device and it uses data again after reboot, and no active applications (no apps in recents when I press menu, left bottom button). Which setting should I look into and what could it be? I cannot afford to loose so much data volume and need mobile data connection. Thanks! edit: form yesterday I'm on 5.9.17, I updated MIUI hopping that it could resolve problem, but it is same as before.