LG V40 ThinQ - How to delete all contacts
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Factory OS: Android 8 (Oreo)
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How to delete all contacts
There are a number of ways, as below. The first two of these may be disabled on some networks/carriers or Android versions however.
1) Go to Settings – Device – Applications – Application Manager. Then swipe from right to left until you are on the All screen (at the top). Then scroll down to Contacts Storage – Clear Data.
2) Go to Contacts. Then hold and press on a contact. Then choose the All option at the top of the screen and select Delete. .
3) Go to Settings – Personal – Accounts and sync. Then press More at the top and choose Disable auto sync. Then go to Gmail (or an account that your phone syncs with) and delete all of your Contacts from there. Then re-sync your phone.
4) Download an App called ‘Delete All Contacts’ and use that as a last resort.
The methods above will delete contacts from the Phone only, not the SIM card.