Google auto-links phone numbers on Android
Google can link a phone SIM number to every Google account on an Android device, Engadget and Android Authority reported. The default has been on since late 2025. Users can switch off automatic verification in the phone Google settings if they want.
Android phones can automatically verify a SIM phone number. They can then attach that number to every Google account signed in on the device. That includes work profiles and secondary accounts. Engadget and Android Authority both reported the practice. Google's support pages say the link covers existing accounts and future ones. Carriers may also re-verify numbers over time.
Android Authority found Google changed its help text between August and October 2025. The update said verification runs by default. A Google Play services changelog dated September 8, 2025, listed automatic number checks on setup. Many users noticed only later. They got email from noreply-phone-verification@google.com saying a number had been verified.
Google says verification helps account recovery and messaging features. Users can turn off "Verify phone numbers automatically" in the phone's Google settings. Numbers already linked must be removed from each account's personal info page, Android Authority reported. Engadget said Google has not fully explained why every account on a phone needs the same number.
Privacy advocates worry about work accounts picking up a personal SIM number. The setting lives on the device, not in a computer browser menu.
The feature sits in Android Google settings under phone number checks. Turning it off halts new automatic links. It does not wipe numbers already stored on each account. Users who share a phone with a work profile may want to check both places. Engadget and Android Authority framed the story as a quiet default that few people noticed at first.
Google's help pages still pitch the feature as a recovery aid. Critics say the default should be opt-in. Android Authority walked readers through the toggle path. Engadget asked why work accounts need a personal SIM number. The debate is likely to continue as more people find the emails.
What we know: Auto phone-number verification is on by default on Android and can span every signed-in Google account.
What we don't: How widely Google will change the default, or how many users will opt out.
Where outlets agree Engadget and Android Authority report that Android auto phone-number verification can link a SIM number across all Google accounts on a device.
Where they differ The cited reports agree on the key facts so far.