Hi! I have bought a flip case(phone case, type book), but when I open it the phone screen doesn't open by itself, as it should, considering that my Galaxy A40 phone does have a hall sensor(flip sensor). On my screen i have a glass screen protector, maybe that is what prevents this sensor to work? My case is magnetic so it should work. Can someone help me with that? Thank you in advance! P.S.: Sorry for my bad English, I am not a native English speaker.
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