Thank you for your support to Tinydeal.
You could change the ring tone as follows :
1. Enter the "user profiles” and choose the "headset" --" Customize"--"tone setup"
2. You could choose the sim1 or SIM 2, and then there are 11 ring tones. You could choose one and press "ok".
Any other questions please feel free to contact us on https://help.tinydeal.com/contact-us. And we would answer you within 24 hours.
Have a nice day!