If the calibration results in a red flashing light ring at the end of the third touch sequence, then a poor calibration was performed. This could be due to the position of your smart device/Kevo fob. When performing the calibration process, keep your device in the front pocket of you pants and remove all other contents from your pocket. For best results, stand at an extended arm's reach from the lock and align your pocket to establish a clear line of sight between the lock and your smart device.
If you are still experiencing issues, lock and unlock Kevo by touch without calibrating, cycle power by removing and reinserting the Kevo battery pack, then calibrate.
If you continue to have calibration issues, call Kevo support.