How to Delete All Contacts and Call Logs on Oppo A12 At Once
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In this video, I will demonstrate the actual process of deleting all contacts and call logs on the Oppo A12 simultaneously, without affecting SIM card information.
ColorOS does offer different reset options that can be triggered whenever the need to restore default settings arises. Among these resets is the one that works by simultaneously wiping all contacts and call logs on the device without affecting any data stored on the SIM card.
Phone calls that you've made, answered or missed along with relevant details such as the phone number, time, and call duration are saved as call logs or call history that can take up a portion of the internal storage in due time. Thus, deleting this information can likewise be regarded among other options to free up storage space on the device. Call logs can be removed individually or simultaneously. And this video demonstrates the latter.
Here’s how to clear out all contacts and call logs on the Oppo A12 without affecting SIM card data.

