My mobile phone is lgl22. I bought lghbs900 headphones today. After some debugging, some functions still don't work. What I bought was

Hello! This is because the earphone is not compatible with the mobile phone or the plug is not in good contact.

The national standard (OMTP)3.5mm interface is adopted for the mobile phone headset of the Bank of China, and the pin connection mode is: left channel-right channel-microphone-ground. Applicable mobile phones: Nokia, Sony Ericsson (full range), ZTE (full range), BBK (full range), Coolpad (full range) and so on.

International standard (CTIA) 3.5 mm interface, pin connection mode: left channel-right channel-ground wire-microphone. This is also the most popular and used standard in the market at present. International standard (CTIA) headphones are suitable for mobile phones: Apple (full frequency), Xiaomi (full frequency), Meizu (full frequency), Sony (full frequency), LG (full frequency) and so on.

If an international standard (CTIA) headset is connected to this non-international standard (OMTP) interface, some key functions will be abnormal. Music has only background sound, and when you press the call button on the microphone, human voice will appear normally, and vice versa.