Google Links Android Device Phone Numbers To All Signed-In Accounts
The default-on behavior undercuts users who deliberately keep a phone number off their account or separate accounts across multiple numbers, and disabling it does not remove the number that was already added.
Reporting from 1 source: GIGAZINE.
Google accounts signed in on an Android device automatically have the device's phone number linked to them, according to reports. Users on Reddit said they received emails from Google stating that phone number verification had been completed without ever being asked to verify. The support page describing the feature was updated between August and October 2025 to state that verification is enabled by default and that all phone numbers are added to all Google accounts on the device.
The setting can be turned off, but the linked number stays. Google's support documentation states that phone number verification runs by default on Android devices, and that every phone number on the device is added to every Google account signed in there. Someone who keeps one account free of a phone number, or who splits accounts across separate numbers, gets the same linking unless they change the setting. Turning off "Automatically verify phone numbers" stops future verification. Deleting the number requires going into the Personal Info tab of account management and removing it there.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.