1 Sign in. Go to http://my.norton.com and sign in. Caution: If you do not yet have an account or if you have not yet activated your product key, first follow the steps for registration. 2 Enter your information and click “Sign in”. 3 Select “I’ll do this later”. 4 Click “Download”. 5 Select Norton Mobile Security and click “Next”. 6 Click “Google Play”. 7 Click “Install” to start the installation. 8 Click “Install” to start the installation. 9 Click “Install” to start the installation. 10 Click “Install” to start the installation. 11 Click “Install” to start the installation. 12 Click “Install” to start the installation. 13 Click “Install” to start the installation. 14 Click “Install” to start the installation. 15 Click “Install” to start the installation. 16 Click “Install” to start the installation. Click “Install” to start the installation.