Android devices are designed with a varieties of lock options that helps to protect your privacy from people who might want to view personal data, like text messages, emails, videos, contacts, and many more. There actually is no harm doing this except that there are times when we due to personal problems and random thoughts, forget some key which may include your pattern or device password and as a result of random guess and trials, we end up blocking the device from any future unlocks (The unlock becomes impossible except if you take the device for a factory reset or flashing which may actually lead to loss of data).
if this is your circumstance, then you have no cause for alarm as you've stumbled upon the right page where the solution will be made available.
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