---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/60500#article
headline: "60500: SNA Phone Number Mismatch"
url: https://www.twilio.com/docs/api/errors/60500
inLanguage: en
dateModified: 2026-06-08T11:29:20.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 60500: SNA Phone Number Mismatch

Log Type: TWILIO

Log Level: ERROR

## Description

This error means Verify completed the Silent Network Auth flow with the carrier, but the phone number detected for the device's active SIM did not match the phone number you sent in the Verification request. Silent Network Auth verifies phone number possession by confirming with the carrier that the SIM on the device invoking `sna.url` corresponds to the number being verified.

### Possible causes

* The phone number you sent in the Verification request does not belong to the SIM in the device that invoked `sna.url`.
* The device uses dual SIM, and the active mobile data session is using a different SIM than the number you are trying to verify.
* The end user is trying to verify a phone number that does not belong to the SIM in the device.

### Possible solutions

* Confirm that the phone number you send in `to` is the same mobile number assigned to the SIM in the device that will invoke `sna.url`. Start a new Verification after the user confirms the correct number.
* If the device may be dual SIM, start the verification with `channel=auto` and include `device_ip` so Verify can assess connectivity and whether the device might be using dual SIM before attempting SNA.
* Fall back to SMS or another Verify channel for this user. For SNA errors, you can generally fail over to another Verification channel, and `channel=auto` can use SMS as a backup when SNA is not suitable.

#### Additional resources

* [Verify Silent Network Auth Overview](/docs/verify/sna)
* [Verify Automatic SMS Fallback Overview](/docs/verify/automatic-channel-selection)
* [Best Practices for Verify SNA Error Handling](/docs/verify/best-practices-for-verify-sna-error-handling)