Oppo: Change the Ringtone Per SIM Card

On Oppo phones running Coloros, the ringtone setting sits inside the sound controls rather than a separate app. This matters most on dual SIM devices, where each SIM slot can ring differently, so you can tell at a glance which line is calling without looking at the screen.

To change it, go to Tap on Settings ➔ Tap on Sound & vibration ➔ Tap on Ringtone. If your device has two active SIM cards, you will first need to Choose a SIM card (Dual SIM) before the tone list appears.

From the ringtone list you can Set a Ringtone using one of the standard sounds included with Coloros, or select a custom audio file stored on the device if that option is available in your list. Setting different tones per SIM is optional but useful if you manage work and personal numbers on the same phone.

This setting only changes the incoming call sound. Notification sounds for messaging apps or system alerts are controlled separately, so changing the ringtone here will not affect how WhatsApp or email notifications sound.

If the ringtone still does not change after saving, check that the correct SIM was selected before setting the tone, since Coloros applies changes only to the SIM chosen in that step.