The World’s Most Secure Android Smartphone. You wouldn’t put money in a bank that didn’t lock its safe. Or leave the doors of your home unlocked at night. Having a smartphone that doesn’t take your privacy seriously is the equivalent. DTEK50 ensures that how you share the private details of your life-your location, your pictures, your texts-is your decision. Not all smartphones are equally secure. With DTEK50, you have built in armor protecting your personal information.