# Teo Mobile Softphone > SIP-based VoIP softphone for iOS with UC platform integration. (iPhone/iPad app by Teo Technologies, Inc..) - Source: https://appshunter.io/ios/app/teo-mobile-softphone/id571093463 (this page in markdown: same URL + `.md`) - Developer: [Teo Technologies, Inc.](https://appshunter.io/developer/407832978) - Category: Productivity, Business - Price: Free with in-app purchases - Rating: 4.36/5 from 134 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 116 MB - Languages: Dutch, English, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian and 3 more - Released: 2012-11-28 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/teo-mobile-softphone/id571093463/reviews.md ## What is Teo Mobile Softphone? Teo Mobile Softphone for iOS is a SIP-based VoIP softphone for the iPhone and iPad that uses Wi-Fi and mobile network connections to make and receive calls with the Teo Unified Communications platform. You can conference, split or swap multiple voice calls, as well as transfer calls, using the same contacts you already have in your iPhone. Access all the capabilities of your Teo UC from anywhere. Phone Features • Call display and voicemail indicators • Speakerphone • Mute and hold functions • Call history – list of received, missed and dialed calls • Contact List and Contact Favorites synchronized with iPhone contacts • Ringtones and contact avatars • Custom wallpaper • Multiple call support: swap between two active calls, merge/split calls, transfer calls • Call recording • Call forwarding • Custom dial plan support • Standard audio codecs: G.711, G.722, SILK-NB, SILK-HD • RFC 2833 DTMF dialing • VPN support Presence Features • View and update your Teo UC Presence status to control presence-base call routing • Monitor the presence status of other Teo UC users in your personal Buddy List • Your presence status may be viewed by other Teo UC users within your system Instant Messaging Features • Send and receive text messages in real-time • See when your contacts are available Advanced Features • Network Traversal: application managed, server managed or user specified; Global IP Support; STUN & ICE • Media Efficiency and Quality: Noise Reduction, Echo Cancellation, and VAD (Voice Activity Detection) • QoS (Quality of Service): ToS Marking and DSCP (Differentiated Services Code Point) • Security and Encryption via TLS and SRTP • DNS SRV record lookups • Call quality statistics HD Video Features • Uses the forward or rear-facing camera on your iPhone or iPod touch to make high-definition video calls • Picture-in-picture view lets you see how you look to the person you’re calling • H.264 and VP8 codec support Accessories The following optional accessories are supported: • Headset with microphone (including Bluetooth): Uses the ear-piece and microphone on the headset. • Headphones (no microphone): Uses the ear-piece on the headphone and the built-in microphone on the iPhone. ** IMPORTANT NOTICE ** Teo Softphone for iPhone is a standalone softphone application and is not a VoIP service. A Teo Unified Communications system is required to make calls. Some mobile network operators may prohibit or restrict the use of VoIP functionality over their network and may also impose additional fees or other charges in connection with VoIP. You must learn and abide by your cellular carrier's network restrictions. Teo will not be held liable for any charges, fees or liability imposed by your carrier for use of VoIP over 3G or 4G carrier networks. ## Key features - SIP-based VoIP calling - HD video calls - Instant messaging - Call conferencing and transfer - Contact list synchronization - Presence status monitoring - Call recording ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Video Calling | Free | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/teo-mobile-softphone/id571093463/reviews.md ### 1/5 — Will not register once closed *2020-04-06* Every time I close the app out, when I try to open it again, it bypasses the primary account and goes straight to trying to register the secondary account, but it will not register and gives a failed error. I have tried disabling the secondary account, renaming it to primary, logging completely out and logging back in, and recreating the primary account. None of these are successful. If I leave the app running in the background it completely drains my battery within 4 hours. The only workaround is to completely delete the app and reinstall every time I close it, which is every single day. ### 5/5 — Nice software *2016-02-22* Great app I would recommend it to all. ## Frequently asked questions about Teo Mobile Softphone ### What is Teo Mobile Softphone? Teo Mobile Softphone is a SIP-based VoIP application for iPhone and iPad that connects to the Teo Unified Communications platform. It allows users to make and receive voice and video calls using Wi-Fi or mobile data. ### Does Teo Mobile Softphone require a subscription? The app itself is free to download and use. However, it requires a Teo Unified Communications system to make calls, which may involve separate costs or subscriptions from Teo Technologies. ### Can I use Teo Mobile Softphone without a Teo UC system? No, Teo Mobile Softphone is a standalone application that requires a Teo Unified Communications system to function. It is not a standalone VoIP service. ### What devices does Teo Mobile Softphone support? Teo Mobile Softphone is compatible with iPhone, iPad, and iPod touch devices. It supports both Wi-Fi and mobile network connections. ### Does Teo Mobile Softphone have ads? No, Teo Mobile Softphone does not contain advertisements. It is a free application without any in-app ads. ### How often is Teo Mobile Softphone updated? The latest version, 6.22.4, was released on March 25, 2026. While specific update frequency isn't detailed, this indicates ongoing development and support for the application. ### What are the advanced features of Teo Mobile Softphone? Advanced features include network traversal (STUN & ICE), media efficiency with noise reduction and echo cancellation, Quality of Service (QoS) settings, and security via TLS and SRTP encryption. ### Can I record calls with Teo Mobile Softphone? Yes, call recording is one of the phone features available in Teo Mobile Softphone. This allows users to keep a record of their conversations. ## Version history (last 5 releases) ### 6.23.2 — 2026-05-28 This version contains improvements to the overall stability and performance of the Teo Mobile Softphone and miscellaneous bug fixes. ### 6.23.1 — 2026-04-23 This version includes a fix for the app launch failure seen in the previous version. ### 6.22.4 — 2026-03-25 Bug fixes and performance improvements Improved call handling when a second inbound call is received ### 6.21.3 — 2025-12-02 Bug fixes and performance improvements ### 6.21.2.2002 — 2025-10-13 More bug fixes and performance improvements. ## Apps similar to Teo Mobile Softphone | App | Rating | Price | Category | | --- | --- | --- | --- | | [SwiftScan:PDF Scan APP](https://appshunter.io/ios/app/swiftscanpdf-scan-app/id1669681920) | — | Free | Productivity | | [Agtrinsic](https://appshunter.io/ios/app/agtrinsic/id1664681960) | — | Free | Productivity | | [ITNS VoIP](https://appshunter.io/ios/app/itns-voip/id6450461640) | 5.0 (1) | Free | Productivity | | [IntelliVoice FusionUC](https://appshunter.io/ios/app/intellivoice-fusionuc/id1068638257) | 5.0 (3) | Free | Productivity | | [AttitudeLab](https://appshunter.io/ios/app/attitudelab/id6443941860) | — | Free | Productivity | | [Skylar](https://appshunter.io/ios/app/skylar/id835813069) | 4.0 (5) | Free | Productivity | ## Related topics [portsip softphone](https://appshunter.io/ios/topics/portsip-softphone) · [acefone softphone lite](https://appshunter.io/ios/topics/acefone-softphone-lite) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*