The solution is to shut down and restart the phone, uninstall the recently installed third-party software, there may be incompatibility, and then reconnect.
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The Bluetooth technology in the car Bluetooth system is a continuation of the Bluetooth technology in the mobile phone, and has the same launching system. Car Bluetooth is a wireless hands-free system designed and developed on the basis of wireless Bluetooth technology. This function is mainly for the use of Bluetooth technology in normal driving and mobile phone connection for hands-free calls, has achieved the liberation of hands, reduce the purpose of traffic accidents. The function of car Bluetooth is to automatically identify mobile phones, do not need cables or phone brackets can be connected to the mobile phone, the owner can not touch the mobile phone, even keep both hands on the steering wheel, can control the mobile phone, use voice commands to control answering or making calls.