If you are using a protective case on your device, ensure that the case is not interfering with the connection of the SAM-1 to the audio jack.
SAM-1 uses the audio jack input of your device to communicate. Ensure that your audio jack volume set to maximum. Also ensure that the internal volume in your phone (Music setting) is not artificially set under 100%.
SAM-1 does have an internal re-chargeable battery. Connect it to your device, open the app, and ensure the device is charging. If the SAM-1 battery needs charging, the SAM-1 will trickle charge from the device and begin reading within a minute or two.**
Your device will normally keep the SAM-1 battery charged.** An optional USB charging cable is available for keeping your SAM-1 fully charged if using the device extensively.
Please note: trickle charge functionality may not be compatible with Android devices. Use of the SAMA-100 charging cable is recommended.