tHotline for Android switches off manner mode from a registered phone number's incoming call after setting period time for call notification. Sometimes we aren't aware the incoming call in manner mode on. if not urgent call, it's no problem. But we don't want to miss an urgent call in next cases. Manner mode off target phone number can be registered, so only registered phone number's incoming call can switch manner mode off. Multiple target phone numbers can be registered, and time to manner mode off can be set by every phone numbers.