---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/60532#article
headline: "60532: SNA Potential Dual SIM Detected"
url: https://www.twilio.com/docs/api/errors/60532
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 60532: SNA Potential Dual SIM Detected

Log Type: TWILIO

Log Level: ERROR

## Description

This error occurs when a Verify Silent Network Auth request cannot be completed because the carrier identified from the device's public IP address does not match the carrier associated with the phone number being verified. This mismatch can indicate a dual SIM device or a shared device, so SNA cannot deterministically confirm phone number possession.

### Possible causes

* The public IP address detected during the SNA flow maps to a different carrier than the carrier associated with the phone number submitted for verification.
* The device has multiple SIMs or SIM profiles, and the active data session does not align with the phone number being verified.
* Multiple people share the same device, so the active carrier data session may belong to a different phone number than the one submitted in the Verification request.

### Possible solutions

* Retry the verification using a different Verify channel, such as SMS or another supported channel for this end user.
* Make a Verification Check request and inspect `sna_attempts_error_codes` so you can confirm and log the final SNA error before or while failing over to another channel.
* If your flow supports it, start the verification with `channel=auto` and include `device_ip` so Verify can assess whether SNA is likely to work and automatically fall back to SMS when needed.

#### Additional resources

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