Use TwinNumber with Cash App.
Getting paid on Cash App from outside the U.S.? Use a real U.S. mobile number on your account and for the verification codes that keep your money secure.
- What we tested
- Receiving SMS verification codes
- Line type
- Mobile
- Last tested
- Oct 12, 2026
We re-test Cash App regularly and update this date.
What Cash App uses your number for
- Cash App sends a one-time login code every time you sign in.
- If you recently changed numbers, you sign in with the phone or email still on the account.
- Moving a number that belongs to another Cash App account may need extra confirmation.
Add your TwinNumber on Cash App
- 01
Open Personal Info
Tap the Your account tab in the top right of the home screen and go to Personal Info.
- 02
Add the new number
Choose Add to enter the new phone number, or tap the existing one to update it.
- 03
Confirm it
Enter the code Cash App sends to finish; you can also make the change at cash.app/account.
Why the line type matters
Payment platforms 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 →
Stripe
PayPal
Lemon Squeezy
PaddleQuestions
Will Cash App ever ask me for my sign-in code?
No. Cash App says its staff will never ask for these codes, and an unexpected code may mean someone is trying to get into your account.
I changed my number and can't sign in to Cash App. What now?
Sign in with the phone number or email that was on the account before the change, then update your Personal Info once you are in.
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 Cash App?
No. We test our numbers with popular services and publish the results. Cash App 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 Cash App codes?
Join the waitlist and be among the first to get your U.S. mobile number.