Could you please share more details about your scenario?
Does the error occur when your run your app within PowerApps Mobile App of Android Mobile Device?
Further, could you please share more details about the error message?
I suppose that the error occurs when you save record within PowerApps Mobile App of your Android Mobile Device, is it true?
If the error occurs when you save record within PowerApps Mobile App of your Android Mobile Device, please check if the version of your PowerApps Mobile App is the latest version, if not, please update it into the latest version, then try your app again to check if the issue is solved.
In addition, please take a try to close your PowerApps Mobile App and re-open it, then try your app again to check if the issue is solved.
I have made a test on my side and don't have the issue that you mentioned. The version of my PowerApps Mobile App is 3.18064.29, the version of my Android Mobile Device is 7.1.1.
Community Support Team _ Kris Dai If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
I am saving a record in the PowerApps Mobile App on my Android Mobile device. "unknown error occurred" warning, does not record.
The version of my PowerApps Mobile App is 3.18064.30, the version of my Android Mobile Device is 8.0.0. the version of PowerApps Mobile App 3.18064.29 on another device, version 8.0.0 of my Android mobile device.
I use is valid in these and all other versions. I do not think it's about the versions, I have problems with all the android system devices problem.
I share the screen image with the error in the attachment.