Reset the Monimoto device:
MM1/MM2 - connect the device to power source (with batteries inserted) for at least 13 seconds;
MM5/MM6 - press and hold the reset button for at least 3 seconds.
MM7 - press and hold the reset button for at least 7 seconds.
If you have an iPhone, please go to your iPhone's Bluetooth settings, click on your Monimoto device and choose 'Forget the device' (if there was a paired device).
Finally, go to Monimoto app - create a new account by providing your phone number and entering the confirmation code. Then pair Monimoto with your phone like you did during the first setup.