Can a mobile phone connect several Bluetooth devices at the same time?

A mobile phone/tablet can pair two or more Bluetooth devices, but only one Bluetooth device can be used at a time.

For example, a mobile phone is connected to a Bluetooth headset and a Bluetooth player. The Bluetooth player is playing music. If the phone calls at this time, the player will stop playing music and then connect the Bluetooth headset.

The reason why two Bluetooth headsets can't be connected at the same time is not that the mobile phone can't save the Bluetooth addresses of two headset devices (the list of Bluetooth devices saved in the mobile phone can be very long), but because of the limitation of Bluetooth transmission bandwidth. Now, in order to ensure the sound quality, Bluetooth headset has greatly improved the encoding formats such as Aptx, which makes it possible for Bluetooth to play near-lossless sound quality under the condition of limited transmission bandwidth.

In other words, the bandwidth of the previous technology was only enough for you to listen to. Connecting multiple devices at the same time, if it is not the case of streaming media transmission such as music, the amount of uplink and downlink data is not large, and most of them are completed instantly-for example, if you send a text message, the mobile phone only needs to send an instruction.

Extended data:

In view of this situation, individual businesses have their own solutions.

For example, Bose can connect two Bluetooth headsets or speakers at the same time through an App, but this complicated function must be realized through an App like BoseConnect.

In fact, the principle is that the mobile phone first connects one of the Bluetooth headsets, then uses this Bluetooth headset as a Bluetooth hotspot to re-encode and send the received media data, and then connects the second headset to the Bluetooth hotspot to play the music in the mobile phone synchronously. But these data sources are not mobile phones, but headphones.

Beats headphones come with W 1 chip, which can seamlessly switch Apple's own devices. Note: it is "switching" rather than "synchronization".

References:

Baidu Encyclopedia-Bluetooth