Delete single call record
Open Calls tab
Long press the call you want to delete
A pop-up will appear offering you several options.
Choose the DELETE option and confirm.
The entry will be deleted.
Delete all call record’s
Click on the MENU icon
Click on SETTINGS
Click on CALLS
Click on Delete call’s
Mark all by clicking icon in the top right
Press the trash icon to delete, confirm with Yes
All your call entries are now deleted.