SIM stop working when I turn off the screen - Samsung Galaxy A20 Questions & Answers

I'm facing an issue when I lock the screen, the SIM doesn't work and I don't receive any calls. When I turn on the screen, the SIM starts to work again. Is this happening to anyone? How can I fix it? I tried to reset twice and nothing changed. Here's a screenshot after I turn on the screen.
My phone is SM-A205, ZTO (Brazilian Model).

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My touch screen goes on every 10 - 30 minutes with my simcard in it. I have tried other simcards aswell but the problem remains.
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Mike
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Hi everyone!
After i rooted and flashed a recovery on my note 3 realized that whenever i reboot or shut down and power on my phone after i unlock the sim (via pin) the phone gets at home screen but is like dead, meaning for about a minute or two i cant lock the screen with the power button, the home and settings buttons dont light up when i push them or do any noise or vibration, wifi remains off, power saving remains off until the phone makes a quick vibe after 2 minutes or so. That quick vibe was quicker before the root and recovery, it was instant after i unlocked the sim. Also after that problem i got a calling delay, after i try to call someone now and then i have to wait for a minute or so until the call starts. The screen stays at dial pad but doesnt do anything, i can dial numbers but no key noise no key vibration. I unrooted my phone, flashed the stock rom again etc but the problem remains. If anyone knows what to do please help me out
I've not done anything to the system at all (Root, flash etc, I'm on full stock) and mine does this too. I boot it up, and for a ful 2-3 minutes it simply remains on and I can't do anything to get it to turn off. I can long-press the power key to bring up the menu, but locking the screen is simply not happening at all. Irritating, but alas.
As for the delay in calling, it usually takes a while between the dialing out and the line to actualy establish, that's probably a network issue.
ShadowLea said:
I've not done anything to the system at all (Root, flash etc, I'm on full stock) and mine does this too. I boot it up, and for a ful 2-3 minutes it simply remains on and I can't do anything to get it to turn off. I can long-press the power key to bring up the menu, but locking the screen is simply not happening at all. Irritating, but alas.
As for the delay in calling, it usually takes a while between the dialing out and the line to actually establish, that's probably a network issue.
Click to expand...
Click to collapse
i don't think that its a network problem because it happens only to me and not always. It takes a while normally but in my case it stuck's on the dial pad not between dial and line. It doesn't even turn the screen off if i put it to my ear...
Have you tried to disable the SIM pin?
I never have a pin code on my SIM and never seen this problem.
SquirtingCherry said:
Have you tried to disable the SIM pin?
I never have a pin code on my SIM and never seen this problem.
Click to expand...
Click to collapse
its not the pin, the phone is like dead for 2 minutes untill it starts, something like it is slow on waking
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