> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/cloud-telefonanlage/en/using-sipgate/die-sipgate-app/welche-einstellungen-benotige-ich-fur-die-satellite-app.md).
# Which settings do I need for the satellite app?
Settings and requirements for using the satellite app
This article lists all the conditions required for smooth use of the satellite app.
### 1. System requirements
#### Operating system
| Platform | Minimum version | Recommendation |
| -------- | ------------------------------- | -------------------------------- |
| iOS | 16.4 (CallKit integration) | iOS 18+ |
| Android | 6.0 (API level 23, Marshmallow) | Current OS from the manufacturer |
| iPad | Compatibility mode | – |
#### Network
* Minimum connection: EDGE
* Recommendation: Wi‑Fi, 4G or 5G
* satellite runs exclusively over a data connection – regardless of SIM card and mobile network provider
#### Unsupported devices and configurations
* Huawei without Google Services (HarmonyOS, AppGallery without GMS): not supported – only Google-compatible Huawei devices work
* VoIP clients such as Zoiper: satellite cannot be used on third-party VoIP clients for regulatory reasons
* VPN that blocks UDP traffic or breaks SIP: leads to connection problems
***
### 2. Device-side settings (MDM / managed devices)
#### Android
* Exclude the app from battery optimization (applies mainly to Samsung, Xiaomi, Huawei)
* On aggressive manufacturers (e.g. Xiaomi MIUI), grant additional background permissions if necessary
* Huawei: Only Google-compatible devices are supported – devices without Google Services (HarmonyOS, AppGallery without GMS) are not compatible
#### iOS
* Keep push notifications allowed in the system settings
* Minimum OS: iOS 16.4 (due to CallKit integration)
* Recommendation: iOS 18+
#### General
* Do not use a VPN that blocks UDP traffic or breaks SIP
* Disable SIP-ALG on firewalls and routers
* Minimum network: EDGE – optimal: Wi‑Fi, 4G/5G
***
### 3. Battery optimization and power-saving mode
Modern smartphones automatically throttle or end background processes to save battery. This directly affects reachability via satellite.
Typical symptoms: incoming calls do not ring, even though the app is installed and logged in – especially after prolonged inactivity or when the battery level is low.
#### Android – recommended settings
| Manufacturer | Setting | Path (example) |
| ------------- | ------------------------------------------------ | -------------------------------------------------------------------------- |
| Samsung | Disable battery optimization for satellite | Settings → Battery → Battery optimization → satellite → Don't optimize |
| Samsung | Allow background activity | Settings → Apps → satellite → Battery → Unrestricted |
| Xiaomi (MIUI) | Allow auto-start | Settings → Apps → Manage apps → satellite → Power saving → No restrictions |
| Huawei (EMUI) | Protected apps / Startup manager | Settings → Battery → Startup manager → enable satellite |
| All Android | Disable power-saving mode (or exclude satellite) | Settings → Battery → Power-saving mode |
\
> Important The power-saving mode (often activated automatically when the battery is low) restricts push notifications and background activity system-wide. satellite should be explicitly excluded from this restriction.
#### iOS
* Background App Refresh must be enabled for satellite: Settings → General → Background App Refresh → satellite: On
* Low Power Mode disables Background App Refresh system-wide → satellite may no longer be reachable
***
### 4. Do Not Disturb (DND) and Focus modes
Do Not Disturb (DND) is enabled by default on many devices – e.g. at night, during meetings, or as a permanent operating state on managed devices. This directly blocks incoming calls.
#### Android – DND
* Incoming calls are muted or not signaled at all
* satellite can be added as an exception in the DND settings: Settings → Sounds → Do Not Disturb → Exceptions → Allow calls from certain apps
* On Samsung devices: Samsung-specific DND settings can override the Android default settings
#### iOS – Focus modes (DND, Work, Personal, etc.)
* iOS focus modes (since iOS 15) block all calls by default that are not defined as exceptions
* satellite must be explicitly added as an allowed app in the active focus profiles: Settings → Focus → \[profile] → Apps → add satellite
* Important for MDM environments (e.g. Jamf): satellite must be added to the allowlist of the distributed focus profiles
* the focus mode as well as DND (do not disturb) should, if possible, be disabled so that the satellite app can be used without disruption
---
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