A9 2018 Keeps freezing in unlock screen. - Galaxy A3, A5, A7, A8, A9 Q&A, Help & Troubleshoot

So, few days ago i switched phones with my dad, i hard reset my A9 2018 and gave it to him.
And here's the thing, after giving it to my papa, the phone started to freeze in unlock screen. One time it froze for nearly 2 hours, today it happened 5 times, as he told me. Only way to fix it is to enter camera by clicking unlock button 2 times, get out of it, and its working again.
Any help? If yes, big thanks.
It started to happen after the hard reset.

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Alright everyone, my G1's touch screen has stopped working. This has happened from time to time, and it works after a usual couple second wait or maybe a shutdown. But this time, it has yet to work after many times of shutting it off, removing the battery, etc. I have tried to hard reset, but always get the same message of "error waiting for notbusy" so i am a bit confused. Please don't tell me I'm going to have to replace.
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hi sounds like bad news have you tried a hard reset
Do a hard reset, press the up and down volume then at the same time press the power button. Keep all three pressed for about three seconds and a hard reset will start. If it happens again you have a faulty device.
I thought a hard reset is only possible in windows. Since I never come so far in booting process, I just tried it once but nothing happend. Not sure if I tried it for 3 seconds I assume I did
zoimt said:
I thought a hard reset is only possible in windows. Since I never come so far in booting process, I just tried it once but nothing happend. Not sure if I tried it for 3 seconds I assume I did
Click to expand...
Click to collapse
Take the battery out then put it back in. Once it's in press all three buttons at once until you see the hard reset begin. It will ask you to confirm by pressing the up volume button.
Oh boy! It started again! I thought I tried to hard reset it with the key combo you also adviced me and nothing happened but this time it worked. Thus I assumed it only works at a later point in the boot process. But thanks for showing me the opposite!
Man, this takes a load off my mind, thanks! Just hope this was a one time thingy and doesn't occur every 28 hours again.
Regards,
zoimt

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