Have you tried clearing it's cache etc ?
Also sometimes if a recent software update has occurred Goodlock can sometimes take a little while to be updated.
Try a soft reboot by turning the phone Off and On.
I wish you all the best. 
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Samsung Electronics, and its partners, use cookies and similar technologies (collectively “technologies”) to store and access information on your device. Some of these technologies are technically essential to provide you with a secure, well-functioning and reliable website. We would also like to set optional/non-essential technologies to give you the best user experience. Optional technologies make it possible to measure the audience of our website, to display personalized advertising on third-party sites based on your profile, to track your location, to carry out targeted marketing campaigns and to personalize the content of our website depending on your usage. Through these technologies, we will collect information such as your interaction with our website, your preferences and your browsing habits.
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