How to change Siri voice from enhanced quality to default?

Hello everybody!
How do I remove the enhanced voice siri on iPhone?

Forum: 

siri voice

Hello

I don't think you can revert to the compact siri voice unless you restore your device or are jailbroken and delete the voice data from your device.

if I restore the device, how

if I restore the device, how can I configure so that siri not download the voice quality improved?
I connected the phone to the charger with wifi and it automatically downloaded, but would like to use the compact voice.

compact voice

To turn on the impact voice go to settings general.
Then go to accessibility.
Next go to voiceover.
After that choose use compact voice.

siri

hello guys!
no, I would try to remove the enhanced, voice off siri not the voice over, or if not possible, to restore the device to prevent it download the voice