---
title: Dahua - iDMSS/gDMSS Connection Failed
description: Dahua has announced that, as of August 15, 2024, it will discontinue maintenance and support services for the iDMSS and gDMSS mobile applications. Users are advised to switch to the DMSS app for continued functionality and support.
---
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1. [Knowledge Base](https://knowledge.ic.plus/?hsLang=en)
2. [Dahua](https://knowledge.ic.plus/dahua?hsLang=en)
3. [DMSS](https://knowledge.ic.plus/dahua?hsLang=en#dmss)
# Dahua - iDMSS/gDMSS Connection Failed
## Dahua has announced that, as of August 15, 2024, it will discontinue maintenance and support services for the iDMSS and gDMSS mobile applications. Users are advised to switch to the DMSS app for continued functionality and support.
### Solution to “Connection Failed” Error on iDMSS/gDMSS
If you're experiencing a **“connection failed”** error when trying to preview, add, playback, or configure your device on iDMSS/gDMSS, follow the steps below to resolve it.
If you are not sure whether you are using iDMSS/gDMSS or DMSS, please check the corresponding APP icons on your phone:
#### Overview
The solution is to transition from **iDMSS/gDMSS** to the **DMSS** app, which provides improved compatibility and functionality.
#### Steps to Transfer from iDMSS/gDMSS to DMSS
1. **Download the DMSS App**
- **Option 1**: On the iDMSS/gDMSS homepage, click “Download Now” in the pop-up notification to be redirected to the app store.
- **Option 2**: Go to the App Store (for iOS) or Google Play (for Android), search for **“DMSS”**, and download it directly.
1. **Log In to DMSS**
- Open the DMSS app and log in with your existing **iDMSS/gDMSS** account credentials.
2. **Upgrade Your Account (If Prompted)**
- If an **“Account Upgrade”** prompt appears, click **“Upgrade Account”**. This will transfer all device information from iDMSS/gDMSS to DMSS automatically.
- If you don’t see an upgrade prompt, you can still log in to DMSS, but some features (like adding new devices or sharing devices) may not work as expected.
3. **Alternative Method: Batch Add Devices Without Logging In**
- Open DMSS and go to the **Device Information** section.
- Export your device information from **iDMSS/gDMSS** and scan the QR code of the device in DMSS to add devices in batch without logging in.
- See below video on how to batch export your devices from iDMSS/gDMSS to DMSS.
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