To update a McAfee Product key, click on Settings and Subscription info and then, click on Settings and Subscription info. Enter your subscription key and click on Submit. On your device, then, open McAfee Mobile Security and enter your PIN to access the application and tap on Options. Then, choose Subscription information and choose Update Subscription. Call on +44-800-368-9065 is you have any issue with the McAfee product key renewal.