For Samsung devices, there are several hidden codes that allow users to access network and signal information. These codes can be entered into the dialer to display diagnostic information, similar to the iPhone’s Field Test Mode. Below are some common codes related to network and signal strength on Samsung devices:
1. Check Signal Strength and Network Info (Field Test Mode)
- To access the service mode for checking network information:
- Open the Phone app.
- Enter the following code:
- This will bring up the Service Mode screen, where you can view signal strength (measured in dBm), the current network band, and other technical network details.
2. General Testing Mode
- Another method to access testing options for signal strength and other network information:
This will open a hidden menu that shows:
- Phone Information
- Battery Information
- Usage Statistics
- Wi-Fi Information
Under “Phone Information,” you can see real-time network information such as:
- Signal strength (RSSI)
- Network type (LTE, 5G, etc.)
- Cell tower information
- IMS registration status (used for VoLTE/VoWiFi)
3. Engineering Mode for Advanced Network Info
- For advanced diagnostics, including LTE bands and more detailed signal info:
This will open the Engineering Mode, allowing deeper insights into the network settings and configurations, though this mode is intended for advanced users or technicians.
4. Signal Strength in dBm
- A quick way to view signal strength in dBm and check network performance:
This will display your current signal strength in numeric format, which is a more accurate representation than the standard signal bars.
5. Network Lock Status
- To check IF your Samsung device is locked to a specific network:
This will show the network lock status and whether the phone is restricted to one carrier or unlocked for use with multiple carriers.
6. Network Mode Switching
- IF you want to manually switch between network modes (like forcing 3G, 4G, or 5G):
This brings up the Service Mode for network mode selection, where you can manually choose the preferred network type or force a specific band.
7. Wi-Fi Status and Signal Information
- To check Wi-Fi connection status and signal strength:
This will display detailed information about the connected Wi-Fi network, such as signal strength, MAC address, and other Wi-Fi parameters.
These codes are useful for technicians and advanced users who want to diagnose network and signal issues on Samsung devices. However, some features or codes may not work on all Samsung models, as they can be region or carrier-specific.