Can i do a default reflection ringtone?

Hello, ngoc73! Thanks for reaching out to Apple Support Communities. 

We've reviewed your question and it looks like you want to change your iPhone 7’s ringtone. Customizing the sounds your iOS devices can make is awesome, so allow us to assist with that. Please start by taking a look here: Use tones and ringtones with your iPhone, iPad, or iPod touch. This explains how you can adjust the ringtone, alert tone, vibration pattern and many other sounds your iPhone 7 can make.

If you would like to make your own ringtones, this article may help: Share songs with GarageBand for iPhone.

If this does not resolve the issue or if you have follow-up questions, please let us know. We're here for you. Have a fantastic day!