# RS-MS3I — DV Gateway Communication app.

> D-STAR transceiver gateway for internet-based communication. (iPhone/iPad app by ICOM INCORPORATED.)

- Source: https://appshunter.io/ios/app/rs-ms3i/id6670289770 (this page in markdown: same URL + `.md`)
- Developer: [ICOM INCORPORATED](https://appshunter.io/developer/1193842631)
- Category: Utilities
- Price: Free
- Rating: 3.00/5 from 3 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 2 MB
- Languages: English, Japanese
- Released: 2024-11-21
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rs-ms3i/id6670289770/reviews.md

## What is RS?

[Features]
The RS-MS3I is an iPhone or iPad application designed to expand the DV mode capability of a D-STAR transceiver using a Terminal or an Access Point mode.
These modes enable D-STAR operations by sending signals from the D-STAR transceiver over the Internet, even when that transceiver is out of the range of a D-STAR repeater. The transceiver sends your voice signals using an Internet, LTE, or 5G network, through an iPhone or iPad.

1. Terminal mode
By operating the D-STAR transceiver through the iPhone or iPad, you can contact other D-STAR transceivers.
In the Terminal mode, the transceiver will not transmit an RF signal, even if [PTT] is held down, because the microphone audio signal is transmitted through an Internet, LTE, or 5G network.

2. Access Point mode
In this mode, the D-STAR transceiver functions as a Wireless LAN access point.
The D-STAR transceiver repeats the received signal from the iPhone or iPad, to other D-STAR transceivers.
Refer to the instruction manual (PDF) for setting details. The instruction manual can be downloaded from the ICOM website.
(URL: https://www.icomjapan.com/support/manual/)

[Device requirements]
iOS15 or later

[Usable transceivers] (As of March 2026)
- ID-52A PLUS or ID-52E PLUS

Note:
- This application operates on iPhone or iPad as a gateway server on the D-STAR system. Therefore, a public IP address must be set on either the iPhone, iPad, or the Wireless LAN router.
- Ask your mobile carrier or ISP for a public IP address. According to the contract, communication charges and/or communication packet limits may occur.
- Ask your mobile carrier, ISP, or manufacturer of your iPhone, iPad, or router about public IP setting details.
- Icom does not guarantee that the RS-MS3I works on all iPhone and iPad. It may not work properly, depending on the OS version, installed applications, or other reasons.
- When a Bluetooth headset is connected to the transceiver, depending on the combination of your iPhone or iPad and the Bluetooth headset, sound may be interrupted, and communication may not be possible. In such cases, please disconnect the Bluetooth headset before use.
- Turn OFF the Wireless LAN function when communicating through an LTE or 5G network.
- Operate your transceiver with the RS-MS3I in compliance with appropriate regulations.
- Icom recommends that you operate them with a club station license.

## Key features

- Terminal mode for internet-based transceiver communication
- Access Point mode to function as a Wireless LAN access point
- Expands D-STAR capabilities beyond repeater range
- Utilizes internet, LTE, or 5G networks for signal transmission
- Requires public IP address for gateway operation

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/rs-ms3i/id6670289770/reviews.md

### 1/5 — Missed opportunity, no reflector support

*2025-08-23*

This app will only work for DStar callsign routing, and is lacking much needed features for reflector support. It would make the D52Plus terminal mode useful, where now it is not at all for most users.

### 1/5 — 不安定が改善されているのか？？

*2025-08-22, version 1.1.0*

このアプリが出てすぐに使用したが、家庭内のWi-Fi接続時のみ利用可能、外出先では全く繋がらない。使えないアプリだった。
今回のアップデート？で改善されたか？再度ダウンロードして試してみる。良くなっていると良いが、、、

### 1/5 — バージョンアップするもダメ

*2025-08-21, version 1.1.0*

バージョンアップしても、モバイル通信では使えない。

### 1/5 — iPhoneの電話回線でつながらない

*2025-08-05, version 1.0.1*

iPhoneでWiFi回線だと直ぐにつながりますが、やはり電話かいせんだとfailed to network を表示してつながりません。改善を望みます。

### 1/5 — かなりダメなアプリ  改修を望む。

*2025-07-09, version 1.0.1*

iPhoneのWiFi接続でのターミナルモードは簡単に接続できますが、電話回線を使っての接続はかなり難しい。iPhoneの再起動をする度にアプリを立ち上げても、ほとんど繋がらない。iPhone側の問題かどうかの切り分けに、eSIMから物理SIMへの交換、iPhoneの基板交換もしてみたが、変わらない。今のところIPADでは使えるが、iPhoneでは使い物にならない。

### 3/5 — Please support ID-50!

*2025-02-12*

It’s absolutely fantastic to see icom finally supporting iOS applications. Is there a way of supporting the ID-50a via usb-c? Thank you!

### 5/5 — Awesome supoort

*2024-12-20*

Previously I rated this lower due to a bad bug with the callsign entry stopping it from connecting to my radio. Once again the devs from Icom solved this very quickly. This is why I am a customer for life.

## Frequently asked questions about RS

### What is RS-MS3I?

RS-MS3I is an application for iPhone and iPad that expands the DV mode capabilities of a D-STAR transceiver. It enables D-STAR operations over the internet using Terminal or Access Point modes, even when a D-STAR repeater is out of range.

### How does RS-MS3I work?

The app acts as a gateway server, sending your voice signals through an internet, LTE, or 5G network via your iPhone or iPad. This allows you to contact other D-STAR transceivers or function as a Wireless LAN access point for the transceiver.

### What are the device requirements for RS-MS3I?

RS-MS3I requires iOS 15 or later and is compatible with iPhone, iPad, and iPod. A public IP address must be set on your iPhone, iPad, or wireless LAN router for the application to function correctly.

### Which transceivers are compatible with RS-MS3I?

As of October 2025, the compatible transceiver is the ID-52A PLUS or ID-52E PLUS. It's important to check the ICOM website for the most up-to-date compatibility information.

### Does RS-MS3I have ads?

No, RS-MS3I does not contain advertisements. It is a free application designed to provide enhanced functionality for D-STAR transceivers.

### What is the rating for RS-MS3I?

RS-MS3I has a rating of 3.0 stars based on 3 ratings. This suggests a mixed user reception, and users may want to check recent reviews for more detailed feedback.

### How often is RS-MS3I updated?

The latest version of RS-MS3I is 1.1.1, which was last updated on November 5, 2025. This indicates a relatively recent update, suggesting ongoing development and support for the application.

### Are there any known issues with RS-MS3I?

Users should be aware that the application may not work properly on all iPhone and iPad models depending on the OS version or other installed applications. Disconnecting Bluetooth headsets is recommended to avoid sound interruption or communication issues.

## Version history (last 5 releases)

### 1.1.2 — 2026-04-02

- Change the default value for the UDP Hole Punch setting to ON (when the Region setting is set to Japan)

### 1.1.1 — 2025-11-05

- Fixed a bug where it did not function properly on some telecommunications carrier lines in iOS 26s.

### 1.1.0 — 2025-08-21

- Improved the standby operation in an environment where no global IP address is assigned (when the Gateway Type is Japan)

### 1.0.1 — 2024-12-20

- Fixed a bug that sometimes causes a communication start error.

### 1.0.0 — 2024-11-22

No release notes.

## Apps similar to RS

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [V-1HD+ Remote](https://appshunter.io/ios/app/v-1hd-plus-remote/id1552831666) | — | Free | Utilities |
| [ProVisionaire Kiosk](https://appshunter.io/ios/app/provisionaire-kiosk/id6480090180) | — | Free | Utilities |
| [V-8HD Remote](https://appshunter.io/ios/app/v-8hd-remote/id1490805143) | 4.5 (4) | Free | Utilities |
| [V-02HD MK II Remote](https://appshunter.io/ios/app/v-02hd-mk-ii-remote/id1579436708) | — | Free | Utilities |
| [Rakuten Casa](https://appshunter.io/ios/app/rakuten-casa/id1501619474) | — | Free | Utilities |
| [iRPM – i Remote Power Manager](https://appshunter.io/ios/app/irpm-i-remote-power-manager/id325341341) | 1.5 (2) | $1.99 | Utilities |

## More apps by ICOM INCORPORATED

- [RS-MS1I](https://appshunter.io/ios/app/rs-ms1i/id1193842632)
- [RS-AERO1I](https://appshunter.io/ios/app/rs-aero1i/id1257985737)
- [RS-R30I](https://appshunter.io/ios/app/rs-r30i/id1418395444)
- [IP500APP](https://appshunter.io/ios/app/ip500app/id1476369389)
- [ST-4001I](https://appshunter.io/ios/app/st-4001i/id1492225169)
- [RS-M500](https://appshunter.io/ios/app/rs-m500/id1535899381)

All apps by ICOM INCORPORATED: https://appshunter.io/developer/1193842631

---

*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 2026-06-04.*