Hey there Misty,
Sorry to hear about the stolen or misplaced device. We do not have the ability to locate a TextNow device. You can in some cases utilize myaccount.google.com to use their location based services. If you are unable to locate or retrieve the device we do recommend contacting us directly by clicking the "Chat with us" button on TextNow.com so we can ensure the device is deactivated as soon as possible.