a) Remove the device from Mobile phone's Bluetooth settings and restart the Mobile phone's Bluetooth

b) Reconnect the device again with the Mobile phone

c) Restart the Mobile Phone and RESET the device and then connect the device with Mobile Phone

Make sure the product is fully charge before doing the RESET. 

"For the TWS- In case the buds are not disconnecting with the Mobile phone even though buds are inside the charging case, then follow the further steps-

a) Put the earbuds into the charging case and put the charging case on charging

if still the issue persist then

b) Clean the earbuds charging PIN to remove any kind of dust or water splashes