My cellphone audio is very low in voice notes

Hello Juancamolinaa_,

Welcome to Apple Support Communities! We understand the audio on your cellphone is low. We're happy to assist you with this.

Check out the steps in this article:

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker

Best Regards.

Hello again Juancamolinaa_,

Thanks for the update. If you change the recording distance as outlined in the following article, is there any range at which the recorded memo has the expected volume when played back?

"Make a basic recording

1. To begin recording, tap .
2. To adjust the recording level, move the microphone closer to or farther from what you’re recording.
3. Tap  to finish recording.

Your recording is saved with the name New Recording or the name of your location, if Turn on Location Services is turned on in Settings  > Privacy. To change the name, tap the recording, then tap the name and type a new one.

To fine-tune your recording, see Edit a recording in Voice Memos.

Use the advanced recording features

You can make a recording in parts, pausing and resuming as you record.

1. To begin recording, tap .
2. To adjust the recording level, move the microphone closer to or farther away from what you’re recording. For better recording quality, the loudest level should be between –3 dB and 0 dB.
3. To see more details while you’re recording, swipe up from the top of the waveform.
4. Tap  to stop recording; tap Resume to continue.
5. To review your recording, tap .
6. To change where playback begins, drag the waveform left or right across the playhead before you tap .
7. To save the recording, tap Done.

Your recording is saved with the name New Recording or the name of your location, if Turn on Location Services is turned on in Settings  > Privacy. To change the name, tap the recording, then tap the name and type a new one.

To fine-tune your recording, see Edit or delete a recording in Voice Memos."

Make a recording in Voice Memos on iPhone - Apple Support

Also, you may find the information and steps outlined in the following article helpful. In particular, you may want to make sure that any case or screen protector has been removed.

If the microphones on your iPhone aren't working - Apple Support

Take Care.