a) Latency varies with different mobile phone models
b) You can play game specifically in gaming mode in mobile phone
c) Internet connectivity should be fine
d) RESET the BT device
 e) Restart the Mobile Phone

Reset Process

1- Remove device name from Bluetooth Interface

2- Take out the earbuds from the charging case. 

3- Long press both the earbuds for 5 seconds. 

4- Place both the earbuds inside the charging 

 case and repeat the pairing process.