# frSIP Mobile (Legacy Support) vs 123Telecom

The clearest difference is update cadence: frSIP Mobile (Legacy Support) at monthly against 123Telecom's every 10 months. frSIP Mobile (Legacy Support) also leads on iOS requirement (7.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

frSIP Mobile (Legacy Support) ships an update monthly, 123Telecom every 10 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | frSIP Mobile (Legacy Support) | 123Telecom |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 10 months |
| Monetization | Free | — |
| Size | 91 MB | 124 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Deltapath, Inc.](https://appshunter.io/developer/1136982704) | [123Telecom Limited](https://appshunter.io/developer/1711029096) |

## What reviewers say

### frSIP Mobile (Legacy Support)

[App page](https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346)

This application allows users to make and receive calls on their office phone line directly from their mobile device. It enables enterprise mobility by pairing your phone with your office extension, allowing you to stay connected anywhere with Wi-Fi or cellular data. The app can run in the background and will ring when your office phone rings.

**Highlights:** Make and receive office calls on mobile, Pair mobile with office extension, Background call ringing, Use office line for outgoing calls, Enterprise mobility

**Features:** macOS Compatibility

**In-app purchases:** none


### 123Telecom

[App page](https://appshunter.io/ios/app/123telecom/id6471536452)

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


## Frequently asked questions

### Is frSIP Mobile (Legacy Support) free?

frSIP Mobile (Legacy Support) is free to download, with no in-app purchases.

### Is 123Telecom free?

123Telecom is free to download, with no in-app purchases.

### Do frSIP Mobile (Legacy Support) or 123Telecom have ads?

Neither frSIP Mobile (Legacy Support) nor 123Telecom shows ads.

### Which is updated more often, frSIP Mobile (Legacy Support) or 123Telecom?

frSIP Mobile (Legacy Support) ships an update monthly, and 123Telecom every 10 months. Most recently, frSIP Mobile (Legacy Support) was updated on November 1, 2026 and 123Telecom on November 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*