The sound quality of the Buds is tuned based on extensive user experiences and is at a relatively high industry standard. However, individual preferences for sound quality may vary. We recommend downloading the Nothing X App and accessing the Equalizer page to choose preset sound effects. Additionally, you can customise the sound according to your personal preferences in the Custom settings.

1) If the earbuds were playing sound from the meeting, the issue might be due to the settings of the web conferencing program. When selecting the Buds channel in the web conferencing program, it periodically forces the sound route to switch to the earbuds. As a result, when you are connected to a meeting on Device A and receive a call on Device B, the earbuds continue to output sound from the meeting and cannot switch to the mobile phone call.
Solution: Change the audio channel in the web conferencing app to the system default.
2) If there was no sound playing from the web conferencing application on the computer through the earbuds, reset the earbuds to factory settings and then reconnect them, or try restarting the mobile device and attempting again.

The device search is an interactive process between the phone and the earphones, so there may be Bluetooth logic issues on the phone side, causing the earphones to stay undetected for some time. This is not a problem with the earphones. Try turning the Bluetooth on your phone on and off, or restarting the phone and trying the search again.

This is normal. When connected to an iOS device, the Bluetooth connection through the app uses the BLE (Bluetooth Low Energy) protocol. The earphones and the app establish a connection via low-power Bluetooth. During a call, the system prioritises processing power and communication bandwidth for the call as priority. Consequently, the communication over low-power Bluetooth is halted.

The Buds' default control settings do not include waking up the voice assistant. To enable it, enter the Control section in the Nothing X app, choose either the left or right ear, and set the Tap & hold Double tap & hold gesture. Once enabled, the voice assistant can get activated on demand.

For additional features, please download the Nothing X App from Google Play or the iOS App Store.

Please confirm whether you have accurately touched the touch area located at the top of the earphone's logo surface. The exact location is also shown in the instruction manual.

Note: The touch area is very sensitive so make sure your fingers have not touched the area before touching it to avoid false triggering or misinterpretation of operations.

1. When the earphones are connected to two devices, and neither device is in a call state:
1) The earphones will output the ringing sound from the device that's receiving a call.

2. When the earphones are connected to two devices, and one of the devices is already in a call:
1) The earphones will play the incoming call alert and the earphone buttons will prioritise controlling the device that's receiving a call. If the earphones hang up the current call, the audio channel will switch to the other device that's receiving a call.

Note:
Please refer to the product instructions on the official CMF website or get in touch with our Customer Support.

1. When the earphones are connected to two devices, and both mobile devices are in an idle state:
1.1 The earphones will output the sound corresponding to that phone if there is an incoming call or notification on either device.
1.2 If one device starts playing music first, the earphones will output the sound of the corresponding phone.

2. When the earphones are connected to two devices, and only one device is in the music-playing state:
2.1 Incoming or outgoing calls on the device that is not playing music will mute the current music on the earphones (without pausing) and switch to the sound of the incoming or outgoing device. After the call is ended, it will switch back to the connected device playing music.
2.2 If the device not playing music starts playing music, there will be no sound channel switching. Both devices will remain in the playing state and the device that started playing music later will be in a muted state.

If the earphones are outputting sound from a specific mobile device, the press control will operate that device. If the earphones are not playing back sound, the control will be directed to the last connected device or the device that last emitted sound through the earphones.

1. When the charging case is opened, the earphones will automatically power on and reconnect.
1.1 If you have less than two devices connected and the Buds are powered on, they will auto-reconnect in the state of dual connectivity. The reconnect targets the last two connected devices. If it's the first time the earphones are enabling dual connectivity and there are no previous reconnect records, the earphones will stay in single-device connection mode (no pairing occurs and the pairing process for new devices needs to be manually triggered by the user holding down the button). If the earphones fail to reconnect to other devices, they will remain in single-device connection mode (no pairing).
1.2. If the earphones are out of range, auto-reconnection will only work for the phone that was out of range.
1.3. Auto-reconnection will not be triggered when the earphones are in an active state (during a call or music playback).
1.4. If the earphones are in the process of auto-reconnection and in an active state (during a call or music playback), the earphones will pause the auto-reconnect for 5 seconds. If the active state is exited within the reconnect timeout, the earphones will resume the paused auto-reconnect until the reconnect timeout is reached (calculated from the first auto-reconnect trigger).

2. Connection priority (connection snatch):
When in dual-connectivity mode, the earphones can be snatched by another device and the following applies:
2.1. When neither of the two connected phones is in music playback state, the earphones will disconnect from the initially connected phone and connect to the device initiating the connection snatch.
2.2. When the earphones enter pairing mode with a new device, and if they are currently connected to two devices, the earphones will disconnect from one of the connected devices during the pairing process. After one of the devices has been disconnected, it becomes discoverable and can be connected to the new device.
2.3 If the earphones are currently connected to two devices, and a third device with a connection record initiates a connection snatch, the earphones will disconnect from one of the connected devices. After disconnecting from one device, it can be snatched by the third device initiating the connection snatch.

Note:
1. Music playback:

1.1 If one of the two connected phones is in the music playback state, the earphones will disconnect from the phone not in the music playback state and then connect to the device initiating the connection snatch.
1.2 If both phones are in the music playback state, the earphones will disconnect from the phone that is not producing sound (i.e. the device in a muted music playback state) and connect to the device initiating the connection snatch.
2. Call State:
2.1 If any of the two connected phones is in a call state, connection snatching will not occur.