I have a Samsung Galaxy S7.  Under settings, the service provider is listed as a GIGA LTE, KT twophone service.  I also have two device maintenance options and two applications options. This is odd.  I had some sort of malware because I received a pop up saying that I have four virus.  I did not click on anything and went into the setting to clear the cache and noticed these odd things under settings.  Please advise. 

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