Why Can't I Lock My OPPO Phone
The lock function is a security feature that ensures the safety of your information and prevents unauthorized individuals from accessing your mobile device. If this feature fails, whether due to software or hardware issues or incorrect settings, it can pose a security risk to users. To resolve this issue and ensure the continued safety of your data, read on!
Note: Check your phone's ColorOS version in [Settings] > [About Phone] / [About Device].
Unable to Lock My OPPO Device
If you have set a lock screen password, only to find out that it can still be opened without unlocking it, your OPPO device may have the "On-body detection" feature enabled.
What is On-body detection feature
The "On-body detection" feature uses sensors to detect when you are carrying your phone, keeping it unlocked as long as it's in motion. This feature will keep your phone unlocked for up to four hours or until you put it down.
How to turn off On-body detection
You can follow below to turn off this feature.
For ColorOS 14 and above: Go to [Settings] > [Security & privacy] > [More security and privacy] > [Extend Unlock] > [On-body detection].
For ColorOS 12 to ColorOS 13: Go to [Settings] > [Password & security] > [System security ] > [Smart Lock] > [On-body detection].
If the abovementioned steps do not fix your concern, prepare your warranty card and contact your nearest OPPO Customer Service. You can also contact OPPO Support so we can help and assist you further with your concern. Depending on your region, you may check if you need to book an appointment before visiting your local Service Center.
* Pictures, settings, and paths might differ from those of your phones, but these won't affect the description in this article.