How do I change my iPhone's ringtone?

“How do I change my iPhone's ringtone?: I can not change my ringtone tired all the obvious solutions”

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Can’t Change Ringtones:

Is this a business-owned device? If so, you might not be permitted to do this.

So, try Disabling Screen Time:

Report back if this does the trick...

Disable Screen Time:

1. Go to: Settings
2. Tap: Screen Time
3. Tap: Turn Off Screen Time(so that it is greyed-out)

“How do I change my iPhone's ringtone?: I can not change my ringtone tired all the obvious solutions”

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Changing the Ringtone:

Are these builtin ringtones? Or are they custom ones that you created with an app?

Update Using a Computer:

It might be a bug. So, see if you can install an update. For a more reliable connection, try updating your iPhone, using a computer... Use my User Tip:  Update your iPhone Using a Computer - User Tip

Since we can't possibly know what you've tried as "obvious solutions," see this --> Use tones and ringtones with your iPhone or iPad - Apple Support