---
title: PingID SDK (May 7, 2019)
description: PingID SDK has an improved SMS authentication service with a more rapid delivery of OTP messages. The pool of SMS dispatching phone numbers has been enlarged. As a result, users may experience delivery of some of their SMS OTP messages sent from telephone numbers that they have not previously seen.
component: pingid
page_id: pingid:release_notes:pid_sdk_release_note_may_7_2019
canonical_url: http://docs.pingidentity.com/pingid/release_notes/pid_sdk_release_note_may_7_2019.html
revdate: January 28, 2024
section_ids:
  enhancements: Enhancements
  improved-sms-authentication-service: Improved SMS authentication service
---

# PingID SDK (May 7, 2019)

## Enhancements

### Improved SMS authentication service

PingID SDK has an improved SMS authentication service with a more rapid delivery of OTP messages. The pool of SMS dispatching phone numbers has been enlarged. As a result, users may experience delivery of some of their SMS OTP messages sent from telephone numbers that they have not previously seen.