This FAQ covers the first steps to take if your Android phone or tablet does not recognize your Echo Meter Touch module.

• If you are using a micro-USB to USB-C adapter or a USB-C to micro-USB adapter, verify that it is an OTG-compatible adapter. Also, try reversing the adapter in the phone.
• Verify that your phone fulfills the requirements on our EMT compatibility page, including OTG compatibility.
• Close all apps.
• Try changing the USB configuration - see steps below.
  

Change an Android device's USB Configuration

This procedure can reset the Android device's USB system. If your Android device does not show the Start button in Live Mode or shows only a blank spectrogram, the steps below may resolve the issue.

1. Open the Settings app and go to System > About phone, or a similar menu, depending on your Android version.
   
   
2. Find the "Build number" entry and tap on it repeatedly several times (you will get a countdown as you tap). You should get a notification saying that developer options have been enabled.
   
3. In the System menu, go Developer Options.
   
4. Select USB Configuration.
5. In this menu, change the option from whatever is currently selected to a different option, other than "Charging".
   We recommend trying "Media Transfer", "RNDIS" or "MIDI." The actual choice is not important; simply changing the setting will reset the USB system.
6. Restart the phone.
7. Open the EMT app and plug the module in.
8. If nothing improves with the above procedure at, try changing the USB Configuration and then restarting the phone a couple more times.
   We have see cases where a phone started working perfectly after repeating these steps a few times.

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