Sign in to your Trend Micro Account. Fill out the required information, then click Next. Open Trend Micro Security for Microsoft Edge. Go to the app Settings, then sign in with your Trend Micro account.
...
Tap the Mobile Security app.
Tap Buy/Activate.
Tap Use an Activation Code, then type your serial number.
Sign in to your Trend Micro Account. Fill out the required information, then click Next. Open Trend Micro Security for Microsoft Edge. Go to the app Settings, then sign in with your Trend Micro account.
...
Tap the Mobile Security app.
Tap Buy/Activate.
Tap Use an Activation Code, then type your serial number.