# frSIP Mobile (Legacy Support)

> Mobile client for enterprise VoIP calls using office phone lines. (iPhone/iPad app by Deltapath, Inc..)

- Source: https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346 (this page in markdown: same URL + `.md`)
- Developer: [Deltapath, Inc.](https://appshunter.io/developer/1136982704)
- Category: Productivity, Business
- Price: Free
- Rating: 3.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 91 MB
- Languages: English, Japanese, Chinese, Chinese
- Released: 2012-01-16
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346/reviews.md

## What is frSIP Mobile (Legacy Support)?

The frSIP Mobile for iOS is a client software designed to work with any enterprise running frSIP UC 2.9.3 or above.  Video calling is only available in frSIP UC 3.1 or above.

This app provides enterprise mobility by enabling users to pair their mobile phone with their office extensions. You may make and receive calls on your office line right from your iOS device whenever you are connected to Wifi or 3G, 4G LTE. 

You may put this app in background mode and it will ring whenever your office phone rings. Outgoing calls placed on this app will be made via your office phone line. Take advantage of our mobility features and stay connected anytime, anywhere!

## Key features

- Make and receive office calls on mobile
- Pair mobile with office extension
- Background call ringing
- Use office line for outgoing calls
- Enterprise mobility

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346/reviews.md

### 5/5 — It's cool you can video call from your iPhone

*2013-06-19*

However it seems to only work in landscape mode if the other end is a vvx phone.

### 1/5 — Crashes immediately

*2013-01-18*

The January 2013 update was useless, at least for the 4S. The app worked great the first few days I used it, but since then it has crashed on startup every single time.  Don't waste your time with this useless tool.

## Frequently asked questions about frSIP Mobile (Legacy Support)

### What is frSIP Mobile used for?

frSIP Mobile allows you to use your office phone line on your iOS device. You can make and receive calls as if you were at your desk, providing enterprise mobility.

### What are the system requirements for frSIP Mobile?

This application requires frSIP UC 2.9.3 or above. Video calling is only supported with frSIP UC 3.1 or above.

### Can I make calls on my office line using frSIP Mobile?

Yes, outgoing calls placed through frSIP Mobile will be made via your office phone line. This ensures your business number is used for all communications.

### Does frSIP Mobile support video calls?

Video calling functionality is available, but only if you are running frSIP UC version 3.1 or higher. Older versions of frSIP UC will not support video.

### How does frSIP Mobile handle incoming calls when the app is in the background?

When the app is in background mode, it will ring whenever your office phone rings. This ensures you do not miss any important business calls.

### What devices is frSIP Mobile compatible with?

frSIP Mobile is designed for iOS devices, including iPhone, iPad, and iPod. It is available for devices running iOS 4+.

### How often is frSIP Mobile updated?

The last update for frSIP Mobile was on February 28, 2017, with version 4.3.2. The app was initially released on January 16, 2012.

### Does frSIP Mobile have ads?

No, frSIP Mobile is free to download and use and does not contain advertisements. It is a straightforward productivity tool for business communication.

## Version history (last 5 releases)

### 4.3.2 — 2017-02-28

This app has been updated by Apple to display the Apple Watch app icon.

- The new application alert introduced in 4.3.1 was changed. Now, anyone using iOS 10+ and signing into frSIP® UC 4.0.1+ will see the alert.
- The toolbar containing the Back button and the Edit button now appear as expected when the Contact Details screen opens from the Phone tab in Contacts

### 4.3.1 — 2017-02-01

This version of frSIP Mobile has been rebranded to be frSIP Mobile (Legacy Support)   This version is designed for all frSIP UC products up to version 3.3.2.   This product will continue to work in frSIP UC Version 4 or above but without the new features and functionalities.  A new frSIP Mobile application will be released on AppStore that supports new features offered in frSIP UC Version 4.

### 4.3 — 2016-09-15

Please contact our support for more details.

### 4.2.0 — 2016-05-13

New features:
- frSIP Mobile iOS now supports Japanese and Chinese (Traditional and Simplified) localization.
- New incoming call screen image will be displayed when receiving incoming call.

Bug fixes:
- Fixed the issue which involves video call to Polycom VVX which could not display video during the call.
- Fixed the issue related to the order of last name / first name in pronunciation field.
- Back support of call forwarding function in frSIP® UC 3.2.
- Whitespaces before a contact number saved in frSIP® phonebook directory will now be able to have a successful call.
- Fixed the issue where frSIP Mobile fails to dial a number saved in local phonebook with the format of (001 XXX XXXXXXXX).

### 4.1.0 — 2016-03-16

- Fixed the issue that audio and video may out of sync in calls with SRTP encrypted.
- Various bug fixes and improvements. Please contact our support for further details.

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## More apps by Deltapath, Inc.

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All apps by Deltapath, Inc.: https://appshunter.io/developer/1136982704

## Related topics

[frsip mobile](https://appshunter.io/ios/topics/frsip-mobile)

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*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 2026-06-10.*