left loudspeaker don’t working

Hi there,

Please try these steps to see if you can solve this issue for yourself or that you need to set up hardware service for your device

Follow these steps

1. If your device has a Ring/Silent switch, move the switch forwards – towards the device's display – so that orange isn't showing. On iPad devices, you can also swipe down from the top right-hand corner to open Control Centre and make sure Silent Mode is turned off. 
2. Open Settings > Focus > Do Not Disturb and make sure Do Not Disturb is turned off.

If you prefer, here are some more steps you can try on your own. After following these steps, you may still need to contact Apple Support to discuss service options.

1. Remove all screen protectors, films or cases from your device. 
2. Check the opening of the speaker to see if it's blocked or dirty. On iPhone only, make sure the receiver isn't blocked or dirty. 
3. If necessary, clean the speaker or receiver opening with a small, soft-bristled brush. Make sure the brush is clean and dry.
4. Go to Settings > Sounds (or Settings > Sounds & Haptics), and drag the Ringer and Alerts slider back and forth a few times. If you can't hear any sound, or if your speaker button on the Ringer and Alerts slider is dimmed, your speaker may need to be serviced.
5. If you can hear sound, try making a call with your iPhone and turn on speakerphone. On iPad or iPod touch, make a FaceTime call. If you still can't hear anything, or you hear static or crackling, then your network or reception could be the issue. Try calling again later or from a different location.

If you are referring to the grills along the bottom edge of the phone, there is one speaker, and one microphone.