Privacy and security

Using single sign-on (SSO)

Sign in to your US Mobile account quickly using your existing Google or Apple account.

1. Sign in to your US Mobile dashboard.
2. Go to Settings (Accounts) and scroll down to Additional Sign-In Options.
3. Turn on the sign-in options you'd like to use.
4. Enter the credentials for your social account and select Continue.

Setting up two-factor authentication (2FA)

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2FA becomes available after you've verified your account.

1. On the web app, go to Settings. On iOS or Android, go to Account > Security.
2. Under Two-Factor Authentication, select Set up your primary method.
3. Choose SMS or Authenticator App.
4. Enter the verification code you receive and select Continue.

tip

If you're setting up an authenticator app on the same phone, use the copy icon next to the manual code to transfer it.

Passkeys

Passkeys let you sign in using your face, fingerprint, or device PIN — no password needed. They're more secure than passwords and can't be phished.

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Passkeys are optional. You can still sign in with your password and 2FA at any time.

Passkeys vs. passwords vs. multi-factor authentication

Here's a quick comparison of passkeys, multi-factor authentication, and traditional passwords.

Feature	Passkeys	Multi-factor authentication (MFA or 2FA)	Traditional passwords
How secure is it?	Top-tier security. Almost impossible for hackers to steal or trick you into giving away (phishing-proof).	Good, but not perfect. Adds a necessary layer of protection, but the second factor (like an SMS code) can still be intercepted.	Easily forgotten, guessed, or stolen in data breaches and phishing attacks.
How easy is it?	Very easy. Use your face, finger, or PIN to sign in instantly.	A bit more friction. You enter your password and then grab your phone for a code.	You enter complex, long strings of text every time.
How do I use it?	Select the passkey for the account you want to sign in to.	Enter your password plus a second code. More secure, more steps.	Enter it manually or pull it from a password manager.
Where is it stored?	Securely on your device — in a password manager or hardware key.	Password stored in a database. One-time code sent to another device.	Wherever you store passwords: your memory, a piece of paper, or a password manager.

Setting up a passkey

You'll need a place to store your passkey — a password manager or hardware key. Common options:

Password manager	Best for
iCloud Keychain	Apple devices
Google Password Manager	Android devices
Credential Manager	Windows devices
Bitwarden	Free, cross-platform
1Password	Power users

YubiKeys are a popular hardware key option.

Steps:

1. Sign in and go to Account > Security.
2. Under Passkeys, select Set up.
3. Select Add passkey and complete setup in your password manager or hardware key.

Managing passkeys

Adding more passkeys: You can create passkeys for multiple devices. Go to Account > Security > Manage passkeys > Add a passkey, then follow your device's prompts.

Deleting a passkey: Go to Settings > Security > Manage passkeys, find the passkey, and select Delete.

note

Passkeys sync within the same ecosystem (for example, iPhone to Mac via iCloud Keychain, or Android to Android via Google Password Manager) — but not across ecosystems. If you use both an iPhone and a Windows laptop, set up a separate passkey on each.

warning

Only set up passkeys on devices you personally own. Anyone who has registered their biometrics on a device could use passkeys stored on it.

Troubleshooting

If you're having trouble using passkeys, here are some common issues and fixes.

I don't see an option to sign in with a passkey

Possible reasons:

• Your device or browser doesn't support passkeys (iOS 16+, Android 9+, or a modern browser is required)
• You haven't set up a passkey yet
• Your browser settings may be blocking the feature

Solution: Update your device or browser to the latest version, or sign in with your username and password.

My passkey isn't working

Try these steps:

1. Make sure you're using the device where you created the passkey.
2. Check that biometric authentication is turned on on your device.
3. Try signing in with your password instead.
4. Delete and re-create your passkey if the problem continues.

I lost access to the device that has my passkey

You can still access your account:

1. Sign in with your username and password on any device.
2. Go to Manage passkeys and delete the passkey for your lost device.
3. Set up a new passkey on your current device.

Important: Always keep your password secure as a backup way to access your account.

Advice for shared devices

If multiple people have registered their fingerprint or face on the same device, they may all be able to access accounts using passkeys stored on that device.

Recommendation: Only set up passkeys on devices you personally own and control. For shared devices, use your username and password instead.

Setting up security questions

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Security questions become available after you've verified your account and set up 2FA.

1. Sign in to your US Mobile account.
2. You'll be prompted to set up security questions on the dashboard — or go to Settings > Security Information > Security Questions > Set It Up.
3. Select 3 questions from the presets or write your own, then enter your answers.
4. Select Continue to save.

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Security questions are used for verbal authentication through product support chat or phone. You won't need to submit them online, and answers don't need to be exact.

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Security questions can't be viewed or changed from the app once set. Contact Product Support to make changes.

Keeping your account safe

We monitor the dark web for compromised credentials. If your sign-in information appears in a third-party data breach, we'll alert you right away so you can take action.

info

US Mobile does not store your password. We store a one-way scrambled reference to it that can't be reversed by us or anyone else. This reference is what gets matched against leaked credentials — not your actual password.