Turn Mono Audio On or Off
If you only wear one earbud or rely on a single-ear headset, Oppo's default stereo playback can cause you to miss dialogue, notification tones, or background sounds that are mixed to the other channel. This shows up during calls, videos, and games where audio cues are split left and right. Mono audio fixes this by merging both channels into one identical signal.
Reject a Call with a Quick Response Text
When you cannot pick up but do not want to ignore the caller completely, a plain decline leaves them guessing. On Oppo phones the Reply option lets you send a short text instead of just hanging up. The tricky part is finding where the quick responses live and how to edit them before the call ends.
Create a Contact Group
Oppo's Contacts app only offers a few predefined groups like Family or Friends, and none of them match a specific team, class, or project chat. If you want to call or message the same set of people at once, you need to build that list yourself instead of relying on the default categories.
Sort Contacts by First or Last Name
When some contacts show their first name up front and others their last name, scrolling through your contact list turns into guesswork. This mismatch usually comes from the sorting order set in the Contacts app, not from how each entry was saved. Calls, Messages, and the dialer all follow that same sorting rule.
Auto Switch to Ear Receiver Setting
During calls, your Oppo phone can automatically move audio from the speaker to the earpiece as soon as you lift it to your ear. If this motion control misfires, calls stay on speaker in public or jump to the earpiece when you actually wanted to keep them on speaker, usually because Auto switch to ear receiver is set the wrong way.
Enable Read Text on Images (Select to Speak)
If your Oppo phone reads captions or app text aloud but stays silent on plain images with printed text, the Read text on images option inside Select to Speak is probably switched off. This experimental recognition feature scans photos, screenshots and camera previews for text and speaks it out loud, but it only works once you turn it on manually. Without it, Select to Speak keeps reading interface elements while ignoring text baked into pictures.
Turn On/Off Wake Google Assistant with Power Button
Holding the power button on your Oppo phone unexpectedly launches Google Assistant, or you want that shortcut but nothing happens when you press it. This depends on a single toggle inside Coloros that decides whether a short press on the power button wakes the assistant. If the setting is out of sync with what you actually want, you either get an annoying pop-up every time you lock the screen or lose a quick way to reach Google Assistant.