The best thing to do first off when this message appears to so make sure the device is powered off and is no longer in active use. Also, if the Sonim phone is in direct sunlight or in a hotter than normal area, try moving it to a location with a lower temperature to let the device cool down.

If you need any further assistance with this question, please contact the Sonim Customer Experience Center at 1-833-MY-SONIM (1-833-697-6646) or email us at [email protected]  We are open 24 hours a day, Monday-Friday and we will further assist in troubleshooting.