Step by Step: Customer History delete all & resync on device

Android Version 1.   On right menu side bar, click on Update & Sync.

2.     Click on Sync Data Now.

3. Press longer time on Customer History wording.

4. Once done, it will automatically delete all log.

IOS Version 1.   Click on Setting. 

2.    Click on Sales Order Default Settings.

3.     Click Delete

4.     Enter the date range From and To. Once confirm, press Trash icon.