You have to check your device’s screen first. Also, you need to ensure that. The screen of your device should not be cracked, damaged, or chipped. In case, you have already a case or screen protector, then turn it off. Also, you have to perform some troubleshooting steps. When the quick checks are not working, then try some more troubleshooting steps. To know about troubleshooting step join att customer service. 1-833-554-5444
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