Journey 2 of 2 · Returning user
Authentication flow
A registered user signs in. Silent Authentication confirms the device and a SIM Swap check runs in the same step. If the carrier check can't complete, the user signs in with an SMS code. If a recent SIM change is found, sign-in pauses for email confirmation.
Main path
Consent is shown again on the sign-in screen, before any carrier check runs.
Welcome back
Sign in with your mobile number. Your carrier confirms it's you.
US carrier consent text and links to the Privacy Policy and Terms sit directly under the Sign in button.
Confirming it's you
Checking with your carrier over mobile data.
Vonage Silent Authentication matches the number to the device. Vonage SIM Swap checks for a recent SIM change.
You're signed in
Verified with your carrier in 1.8 seconds. No code needed.
Both checks pass. Anthrogate returns the result and keeps nothing.
Fallback · SMS code
Used when the device is on Wi-Fi only, the carrier is unsupported, the number doesn't match, or the user taps “SMS the code instead” on A2.
Enter the code we texted you
We couldn't confirm your number with your carrier. We sent a 6-digit code to +1 (312) 555-0147. Message and data rates may apply.
Didn't get it? Resend in 0:24
Vonage attempts SMS delivery first. Twilio is the planned fallback if Vonage fails to deliver the code. If it doesn't arrive, the user can switch to email (same screens as RE1 and RE2).
You're signed in
Confirmed with a text code.
Signed in with the SMS code.
Step-up · Recent SIM change
Used when SIM Swap reports a SIM change inside Anthrogate's risk window. SMS codes are skipped here, because a swapped SIM would receive them. The same email code screens (AS2, AS3) are used when the user taps “Email the code instead” on A2.
We need one more check
Your carrier reports a recent SIM change on this number. To protect your account, confirm it's you another way.
Sign-in pauses. The user is told why and given a safe way forward.
Check your email
Confirming it's you. Enter the code we sent to alex.rivera@example.com.
Didn't get it? Resend
A one-time code goes to the email on file.
You're signed in
Confirmed by email after a recent SIM change.
Access restored, with a security notice sent to the user's email.
Consent settings · Opt-out
Available in the Anthrogate's settings at any time. Turning it off stops all carrier checks for that user.
Carrier verification
How this app confirms your number through Anthrogate.
A clear switch, plus a plain summary of what Anthrogate does and doesn't keep.
Carrier verification is off
We won't ask your carrier about your account or device. You'll sign in with a text or email code.
Future sign-ins use SMS or email codes only.