Xfinitymobile.com/activate login:Once on the activation page, log in to your Xfinity Mobile account using your Xfinity username and password. If you're a new customer, you can create an Xfinity username and password to access your account.With a few clicks, you'll be guided through the activation process, where you can select your plan, transfer your existing number or choose a new one, and set up your device preferences. The step-by-step instructions make it easy to customize your mobile experience to suit your needs.
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