Silent mode not available? How to delete all contacts stored on device? GS6 Pro

Hello, I would like assistance with 2 issues, one is that I cannot seem to enable silent mode (not do not disturb) on the phone, I turned of call sounds, no ringtone, vibrate only but somehow it still beeps when I receive a call? Second issue is that I downloaded contacts to the device without backing them up first so some are missing and I need to delete all of them and then redownload the updated vcf file with all numbers.. Help is appreciated thank you!

Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online services

Modes, seems to cause difficuties

:magnifying_glass_tilted_left: Search: Modes.

“Delete all” is a known issue … I think does not exist.

First ensure your confidence in your “new” .vcf

Then delete contacts from the phone, it may take a while if you want (finally ) to avoid duplicates.

With the deletion, there is no ‘select all’ option, but I reckon in contacts (actual app, not in the phone app) you can select one and boxes start showing next to them - I’d go down the list selecting all one by one and then bin them all using the bin icon.

Should not take too long.

Thank you both for the input!