Use TwinNumber with Microsoft.
Adding a phone number to your own Microsoft account? Use a real U.S. mobile number for the security codes Microsoft texts you, while it still offers SMS on personal accounts.
- What we tested
- Receiving SMS verification codes
- Line type
- Mobile
- Last tested
- Oct 12, 2026
We re-test Microsoft regularly and update this date.
What Microsoft uses your number for
- Security codes sent to your number to confirm it's you when you sign in.
- A phone number you can add in Your info as a way to sign in.
- Account recovery codes, which Microsoft is phasing out for personal accounts.
Add your TwinNumber on Microsoft
- 01
Open the Security tab
Sign in at account.microsoft.com/security and select Manage how I sign in.
- 02
Add the new number
Choose Add a new way to sign in or verify, enter the number and type the code Microsoft sends.
- 03
Remove the old one
Once the new number works, remove the old one, without changing all your security info at the same time.
Why the line type matters
Account providers often check whether a number is mobile, landline or VoIP before sending a code, and many turn VoIP numbers away. TwinNumber numbers are registered as mobile.
Why banks reject Google Voice →
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ProtonQuestions
Is Microsoft stopping SMS codes?
Microsoft says it will start phasing out SMS for sign-in and recovery on personal accounts, in favor of passkeys and a verified email. The option to add a phone may already be missing on some accounts.
Can the same number be on two Microsoft accounts?
No. A phone number can be added to a single Microsoft account, though you can move it if you own both accounts.
Does Microsoft accept VoIP numbers?
No, VoIP numbers can't be added to sign in or get verification codes. TwinNumber numbers are registered as mobile.
Do I need to live in the U.S.?
No. TwinNumber works from 150+ countries with just a browser and an internet connection.
Is TwinNumber affiliated with Microsoft?
No. We test our numbers with popular services and publish the results. Microsoft is a trademark of its owner.
What if a code doesn't arrive?
Request a new code, then check your inbox and notification settings. If it keeps failing, contact us and we'll look into it.
Ready for Microsoft codes?
Join the waitlist and be among the first to get your U.S. mobile number.