Sets PhoneSvc to Manual and stops it now. It manages phone-call state/telephony for the rarely-used Your Phone / calling integrations. On a desktop without phone integration it idles. Manual keeps it available on demand so dialer/telephony apps still work if you use them. Reversible.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/sc-config