Install Android 10 on Samsung Galaxy J4 Plus (LineageOS 17.1) - How to Guide! By Smartphone Upgrade Guide

Install android 10 on galaxy j4, plus by lineage OS 17.1. Please check the description for important notes and all the download links first download, ROM and g apps packages, then transfer the downloaded files to the phone storage link is in the description below step.2 boots, your device into tarp recovery once in tarp click on wipe, advanced wipe and select the checkboxes, as shown in the image excluding internal storage step, 4 swipes the button to wipe the device step.5 go back to the recovery main screen and tap on the installation button step, 6, navigate to the storage and select the ROM zip file step. Seven. Finally, swipe the button on the screen to install ROM file step eight flash, the g apps zip package in the same manner step nine after g, apps flashing, completes, select, wipe cache and Davis from bottom left side of screen and swipe to wipe step 10. When the flashing process is complete, hit reboot system, that's it. You have successfully installed the ROM on your device.

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Source : Smartphone Upgrade Guide