TS, pasama na rin nito, Kung Rooted ang Phone mo at may Root Explorer ka then try this.
How to clear data usage for Rooted Phone Users:
NOTE: Do a CWM/TWRP Backup before doing this.
Requirements:
1. Rooted Phone
2. Root Explorer app
Procedure:
1. Open Root Explorer App
2. Punta ka sa /data/system/netstats
3. Check mo lahat files na nandon then i-delete
4. Reboot
Na-Clear na yung Data Usage mo.
Credits goes to Original Author nito or sa unang nakaalam ng method nito