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Activate the Trend Micro Mobile Security app on your iPhone or iPad to enable its premium features. Make sure the app is installed first.

I'm activating for the first time

Go to Activation Portal.
Click the Get Started button.
Create a Trend Micro Account using your email address or phone number.
Provide a secure password, then click Next.
Type your First and Last Name to complete your profile, then click Next.
Enter your activation code, then put a check beside I have read and agree to the Trend Micro License Agreement. Click Next to proceed.
On your iPhone or iPad, open the Mobile Security app.
Select Settings, then sign in with the Trend Micro account you created.

I have a new activation key

Go to the Activation Portal.
Below the Get Started button, click Or sign in to your Trend Micro Account link.
Sign in with your email address or phone number, then click Next.
Type your secure password, then click Next.
Enter your activation code, then put a check beside I have read and agree to the Trend Micro License Agreement. Click Next to proceed.
On your iPhone or iPad, open the Mobile Security app.
Select Settings, then sign in with your Trend Micro account.

NOTE: If you are already signed in, sign out of the app, then sign in again to update your subscription.

Renewed subscription without an activation key gets extended automatically. Check the new expiration date in your Mobile Security app's settings.