If you have a Samsung Galaxy A3 2016 SM-A310F on Binary 4(U4) with a forgotten screen lock, even with FRP ON, you can successfully remove the screen lock without losing your data on the device.
This short tutorial on how to remove screen lock on Samsung Galaxy A3 2016 SM-A310F U4 Binary without data loss will work even with FRP(factory reset protection) ON.
To successfully remove lock screen password/pattern or PIN on the Samsung Galaxy A3 2016 SM-A310F follow the step by step instruction below.
How To Remove Screen Lock On Samsung Galaxy A3 2016 SM-A310F Without Data Loss
Step 1: Download and install Samsung USB drivers on your PC
Step 3: Download and extract this file SM-A310F_A310FXXU4CRG2_Remove Screen lock without data loss.rar to your PC. It contains sboot file and the full firmware (AP, BL, CSC etc) for the Samsung A3 2016 SM-A310F
Step 4: Put your Samsung Galaxy A3 2016 SM-A310F into Download mode by pressing Volume Down + Home button + Power button, let go of the power button and press volume up to confirm booting into Download/Odin mode
Step 5: Connect your Samsung Galaxy A3 2016 SM-A310F to the PC via a USB data cable.
Step 6: Open Odin from the Odin file folder you extracted in step 2
Step 7: Click on AP, locate and select SBOOT file inside the extracted folder/file you downloaded in Step 3.
Step 8: Click on the Start button to flash the file.
Step 9: Close and reopen Odin again, then extract and load the other firmware files in the folder accordingly, AP, BL, CP, and CSC and flash it too. Your Samsung Galaxy A3 2016 SM-A310F will restart into recovery mode. In recovery mode, click on Reboot System now to boot the device fully.
Step 10: Once your phone boots up, you can access your data again and also do a backup to keep the files safe.
Below is a video on how to remove screen lock on Samsung Galaxy A3 2016 SM-A310F on U4 binary without data loss.