Go to Settings and select All Apps. Select the option Camera and go to the bottom of the page that then appears and choose ‘Clear the Cache and Data.’. Then select force stop. Your device not being updated can be a reason. Go to Settings and try to find the latest updates for your phone and update it. Method 1: Unlock OPPO Phone by Factory Resetting. Generally, the way to remove the cracked screen lock is to restore the factory settings, In fact, restoring your phone to factory settings can often solve many problems, such as your phone getting stuck, going into recovery mode, etc. Press and hold your Power button on the right-hand side of the phone until the Samsung logo appears on the screen to put the device in Safe Mode. When the logo appears, let go of the Power button and hold down the Volume button on the upper left-hand side. The device should power on. You’ll see the Home screen, and at the bottom, you will see Learn how to Enable Unknown Sources on OPPO A71 (2018) in a couple of minutes and amazing apps from whenever you want! Firstly, activate your OPPO A71 (2018) and tap. Secondly. scroll down and open. Nextly, scroll down again and click on Unknown source installations. Lastly, pick which source from which you want to and tap on the switcher next If updating the apps does not resolve the problem, try uninstalling and reinstalling them to reset their settings and configuration. If the above methods do not solve the microphone issue on your Oppo A71 Android device, consider contacting the Oppo A71 customer support or visiting an authorized service center for further assistance. Force restart the mobile. This method can make us rule out if we have the mobile turned off or if the screen is frozen black . To do this we will have to press and hold the power buttons and turn up the volume for 8 seconds until we see the OPPO logo. This method will not erase any content from our mobile. How to Adjust Volume and Sound Settings on your Oppo A71 Android Device Method 1: Using Volume Buttons. To adjust the volume on your Oppo A71 Android device, follow these steps: Locate the volume buttons on the side of your device. Press the Volume Up button to increase the volume or the Volume Down button to decrease the volume. Oppo A71 Soft Reset. How to soft reset on your Oppo A71 ? If your Oppo A71 is frozen or unresponsive you can perform a soft reset for restart your device. This is a safe and quick way to reboot your device without losing or erasing any data. How to soft reset on your Oppo A71 ? If your Oppo A71 is frozen or unresponsive you can perform a soft Check out how to force restart Android 7.1 Nougat. As a result your OPPO A71 should reboot and start running again. Click here to find out more about soft reset operation. Press and push the Power key for a couple of seconds. Now choose Power off and select OK. In the next step you have to wait for about 5 seconds. Then turn on the device by Guidance on troubleshooting and resolving issues when mobile data is not working or experiencing slow speeds. This guide is for the Oppo A71, which is equipped with a Li-Ion 3000 mAh, non-removable battery and a 5.2 inches, 74.5 cm2 (~68.2% screen-to-body ratio) display Ogk7j.