Smartphone Questions? Ask A Smartphone Technician for Answers
Try a master reset, that will eliminate the possibilty of this being a software issue and help you determine if it is a hardware issue.
A master reset restores the original factory settings and may delete your personal data on the internal storage, such as downloaded content, ringtones, images, apps, and contacts. It does not delete data stored on the SIM card or SD card.
To perform a master reset, follow these steps: