The best way to protect your phone is by using a OnePlus 8 protective glass. Here's a great deal that's optimised to protect your screen and is made with solid quality.

Features of this tempered glass for OnePlus 8:

• Excellent protection against scratches and tears.
• Protects the screen from accidental knocks and drops of the phone.
• The glass goes ALL the way to the edge of the phone (Not compatible with cases)
• Super thin tempered glass at just 0.2 mm.
• 3D curved edges
• Good quality.
• Made in a discreet design with rounded corners following the shape of the phone.
• Safe 'anti-explosion' function - the protective glass will never shatter and be dangerous.
• Cleaning kit for the screen before mounting is included.

You greatly minimize the risk of scratches and tears to the screen when you use this OnePlus 8 protective glass, which is produced in a good quality. The glass goes all the way to the edge a little off the edge, but that doesn't change the protective performance. You can therefore NOT use the glass with all cases.