Back in April, OnePlus released the much-anticipated Android Pie update for the OnePlus 3 and 3T as community beta build. In May, the second community beta builds pushed to the devices with some bug fixes. In the same month, the company released stable Android 9 Pie update as OxygenOS 9.0.2 for both OnePlus 3 and 3T.
After installing the stable Android 9 Pie update, many OnePlus 3 and OnePlus 3T users reporting issues like system lags, camera issues, call screen issue, and fingerprint unlocking issues on company’s community forum. Though a bug fixing OxygenOS 9.0.3 update released for both devices, it did not fix the most of the issues listed.
OnePlus may fix all these issues with a software update in the coming days. In the meantime, here is a temporary fix for all the issues related to OnePlus 3 and 3T Android 9 Pie update.
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Temporary fix of OnePlus 3/3T Android Pie update issue
System Lag: If you feel system lag after installing the Android 9 Pie stable update on your device, then wiping the system cache probably will solve it. You can do this by booting your device into recovery.
First, turn off the phone, then press and hold the Power & Volume Down buttons together until the phone turn on in to recovery. In recovery menu, choose the Wipe cache option using volume buttons and select it using power button. When done, reboot the phone.
Camera app issues: If you come across issues with the camera, then clear camera app cache and app data from your phone. To do so, go to Settings > Apps & notifications > camera > storage > and delete cache and data.
Mobile data issue: OnePlus 3/3T users, who cannot connect to the internet after upgrading the device to Android 9 Pie, reset the network setting (APN) to default and restart the phone.
Note that most of the issues can be fixed by factory resetting the device, but it will wipe all data, installed apps and files saved on the phone, so take a backup.
How to Factory Reset OnePlus 3/3T Runs Android Pie
First method: Open the Settings app, scroll down and under System you will see Reset options. Click Erase all data, select the Reset phone option and then click Erase everything button. Your phone will reboot after the process completes.
Second method: Turn off the phone and boot into recovery using Power + Volume Up key combination. You will see a Wipe data/Factory reset option in recovery. Go to this option using volume button and select it using the power button. The phone will reset to default. Once done, select Reboot system now option to restart the device.
