: If you're unsure about the cause of the crack or if you believe it's a manufacturing defect, it's best to visit an Apple Store or an Apple Authorized Service Provider. They can assess your device and advise on the best course of action.
Apple defines a cracked screen as "Accidental Damage" or "Abuse." Unless you can prove that the screen cracked spontaneously due to a manufacturing defect (which is extremely rare and usually involves a specific stress fracture pattern without an impact point), the warranty will not apply. apple limited warranty cracked screen