hi i have a problem with my phone, my main speaker wont work but my ear speaker works. instead the the main speaker when im going to watch a video its always on sa ear speaker. i allready reset my phone still the same

Hi llanzaraf.

welcome to the Apple Community.

You might want to try troubleshooting, via browsing the Apple support articles below:

If your iPhone is stuck in headphone mode - Apple Support

Check that you aren't in Silent mode:

How to put your iPhone on vibrate, ring, or silent mode - Apple Support

When you’re on the phone or listening to songs, movies, or other media,

the buttons on the side of iPhone adjust the audio volume.

Otherwise, the buttons control the volume for the ringer, alerts, and other sound effects.

You can also use Siri to turn the volume up or down.  (+ Silent mode: on / off)

Adjust the volume on iPhone – Apple Support

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You might want to check the settings.

You can adjust audio and visual accessibility settings to suit your hearing needs.

For example, set mono audio, volume balance, phone noise cancellation,

LED Flash for Alerts, and headphone accommodations.

Adjust the audio settings on iPhone – Apple Support

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If you still need help:

There is a "Get support" link to Apple at top right on this discussion page.

Or

You might want to take your iPhone into an Apple store for expert advice.

a Genius Bar reservation is recommended:

Genius Bar Reservation and Apple Support Options - Apple

or

Apple phone numbers around the world.

Contact Apple for support and service - Apple Support

All the best :-)