Hi, the screen on my S9 goes black with a flickering green line at the top and takes ages to clear. When this happens I can't do anything with the phone so just have to leave it for 5/10 minutes. This happens several times a day. Also sometimes if I am writing a text or email the background is a greeny/brown colour but I can send the email/text however if my phone then rings I am unable to answer it. I'm feeling fed up as my phone is only 2 years old. Can anyone help please?
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