SAMSUNG J7 IS A ONE OF WONDERFUL MOBILE.I ALSO BUY IT FROM THE MARKET PLACE AND I FEEL THAT IT’S VERY NICE AND ALSO NO BAD EFFECT ON LAPTOP OR PC. ITS VERY GOOD QUALITY PRODUCT.IT EASILY INSTALLED IN PC. SAMSUNG GALAXY J7 WORK VERY FAST AND ALSO NO ISSUE FOR VIROUS.I LIKE IT AND WANT TO USE IT AGAIN AND AGAIN.