Hi Phil. Welcome to justanswer.
Resetting will make the phone as the brand new. The data saved on the phone will be erased but all the settings will be set to default. Go to Settings. Under Backup and restore, you will find an option Factory data reset. Select it and let the process finish. Now set up your phone again and check if the problem is still there or not.
Go to Settings- About phone. Update the phone`s OS
That's great Phil. I am happy that your problem is resolved.
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