Free

Details

  • Released
  • Updated
  • September 4, 2018
  • April 7, 2026
UNIVERGE ST500 screenshot #1 for iPhone
UNIVERGE ST500 screenshot #2 for iPhone
UNIVERGE ST500 screenshot #3 for iPhone
UNIVERGE ST500 screenshot #4 for iPhone
UNIVERGE ST500 screenshot #5 for iPhone
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About

This app allows users to make and receive business calls from their mobile devices as if they were at their desk. It integrates with iOS contacts and offers various call management features, simplifying business communications and potentially reducing mobile call costs.

Make and receive business calls from mobile
Integrates with iOS phone contacts
Call history grouped by contact
Hands-free and Bluetooth headset support
Video call capabilities
Security and encryption via TLS and SRTP
Voicemail access and message waiting indicator
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What's New in UNIVERGE ST500

9.0.18002

April 7, 2026

- Minor bug fixes.

User reviews

How to Debug?

There is an option to adjust log level and even to export log files.
But those logs were password protected zips. We could not find any source to provide us a password for that.
So debugging seems quite impossible…

Issue with Apple Car Play

The app interferes with Apple Car Play. It switches audio to the ST500 app as its running in background. There should be an update to make it friendly with Apple Car Play.

Bug with notifications and ios16

With ios16, if ST 500 is not on the main screen, it doesn’t ring. And the notification doesn’t pop up.
It’s a real problem from a usage point of view. When will it be fixed?
Merci

Response from developer

Thank you for contact us. Please contact the NEC sales division or NEC Dealer.

Terrible

This app is so far behind. For the amount you pay for the system the app is a huge let down as soon as your phone goes to sleep you can’t receive calls trfs to you is just one example. Given that remote working has been a thing for 2 years now it’s annoying that this systems functionality is so poor!!!!
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Battery life drain

The app performs well but has major flaws, massive battery drain (70% plus even with light use) also calls on WiFi not handed off well between access points.

Developer apps

FAQ

What is UNIVERGE ST500?

UNIVERGE ST500 is a mobile softphone application that allows you to make and receive business calls from your iPhone or iPad as if you were at your desk. It aims to simplify communications and reduce mobile call costs for businesses.

Is UNIVERGE ST500 free to use?

Yes, UNIVERGE ST500 is free to use on compatible NEC Phone systems. However, it requires an activation code from your NEC representative and may need spare license capacity on your phone system.

What devices does UNIVERGE ST500 support?

UNIVERGE ST500 supports iPhone, iPad, and iPod devices. It is compatible with iOS versions and utilizes features like iOS CallKit and PushKit.

Does UNIVERGE ST500 have ads?

No, UNIVERGE ST500 does not contain advertisements. It is a business communication tool designed for professional use without interruptions from ads.

How does UNIVERGE ST500 help reduce costs?

It can save your company money by preventing employees from call-forwarding their desk phones to mobile numbers. Staff can make free internal calls and inexpensive local calls through the softphone instead of using their mobile plan for all calls.

What call features are available in UNIVERGE ST500?

The app supports making and answering calls, call waiting, hold/retrieve, transfer, call park, station hunt groups, call pickup, and voicemail access with message waiting indicators. It also offers call forwarding options.

How is my communication secured with UNIVERGE ST500?

UNIVERGE ST500 provides security and encryption for your calls via TLS and SRTP protocols. This ensures that your business conversations are protected.

What are the voice codecs supported by UNIVERGE ST500?

UNIVERGE ST500 supports a range of voice codecs including Opus, G.722.1, G.711A/μlaw, G.722, and G.729a, ensuring high-quality audio for your calls.