No more sound on my Asus Zenfone 5

My Asus Zenfone 5 is beginning to have some malfunctions : No more sound, which means : - I can't make calls (the phone freezes to black and I can only start it up again by holding the power button) - I can't receive calls (callers go directly to voicemail) - I can't open the camera to take pictures or videos - Alarms don't ring, they just vibrate - I can't listen to music - I can't watch videos (videos taken with my phone, on youtube, on any social media app...) : video just won't start. I got this bug report from NewPipe, a youtube client : ## Exception * __User Action:__ play stream * __Request:__ Player error[type=ERROR_CODE_AUDIO_TRACK_INIT_FAILED] occurred while playing https://www.youtube.com/watch?v=RH2v_m5dBdg * __Content Country:__ GB * __Content Language:__ en- * __App Language:__ fr_FR * __Service:__ YouTube * __Version:__ 0.25.0 * __OS:__ Linux Android 9 - 28 Crash log

com.google.android.exoplayer2.ExoPlaybackException: MediaCodecAudioRenderer error, index=1, format=Format(null, null, null, audio/raw, null, -1, null, [-1, -1, -1.0], [2, 44100]), format_supported=YES
 at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:566)
 at android.os.Handler.dispatchMessage(Handler.java:102)
 at android.os.Looper.loop(Looper.java:198)
 at android.os.HandlerThread.run(HandlerThread.java:65)
Caused by: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed 0 Config(44100, 12, 44100)
 at com.google.android.exoplayer2.audio.DefaultAudioSink$Configuration.buildAudioTrack(DefaultAudioSink.java:2110)
 at com.google.android.exoplayer2.audio.DefaultAudioSink.buildAudioTrack(DefaultAudioSink.java:1070)
 at com.google.android.exoplayer2.audio.DefaultAudioSink.buildAudioTrackWithRetry(DefaultAudioSink.java:1049)
 at com.google.android.exoplayer2.audio.DefaultAudioSink.initializeAudioTrack(DefaultAudioSink.java:846)
 at com.google.android.exoplayer2.audio.DefaultAudioSink.handleBuffer(DefaultAudioSink.java:929)
 at com.google.android.exoplayer2.audio.MediaCodecAudioRenderer.processOutputBuffer(MediaCodecAudioRenderer.java:703)
 at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.drainOutputBuffer(MediaCodecRenderer.java:1894)
 at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.render(MediaCodecRenderer.java:792)
 at com.google.android.exoplayer2.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:989)
 at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:490)
 ... 3 more
 Suppressed: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed 0 Config(44100, 12, 44100)
  ... 13 more

I don't know if it's related, but I've also noticed that in the play store, when I check the the compatibility of any app with my device, it is identified as Asus UNKNOWN_PRJ_ID, instead of X00QD. I don't know how to proceed from there, is my phone fixable ? The last time it happened, I was able to *fix* the issue by shutting down and restarting the phone a dozen times, but this time it's not working.