It seems like there is a minor typo in the URL you provided. The correct URL for activating Xfinity Mobile service is xfinitymobile.come/activate. Here's a concise step-by-step guide to help you activate your Xfinity Mobile service using the correct URL:

1. Open Your Web Browser : Launch a web browser on your computer or mobile device.

2. Go to the Activation Page : Type the following URL into the address bar of your browser and press Enter.

3. Log In or Create an Account :
- Existing Xfinity Customer: Enter your username and password in the provided fields and click "Sign In".
- New Customer: Click on "Create One" and follow the prompts to set up your Xfinity account. Provide your email address, create a password, and verify your account.

4. Enter the Activation Code : After logging in or creating your account, enter the activation code provided in your welcome email or activation kit from Xfinity Mobile.

5. Verify and Confirm : Review the details displayed on the screen to ensure accuracy, particularly the activation code.

6. Select Your Plan : Choose the Xfinity Mobile plan that best fits your needs. Options vary based on data usage, number of lines, and device preferences.

7. Complete Activation : Follow the on-screen instructions to finalize the activation process. This may include agreeing to terms and conditions specific to Xfinity Mobile services.

8. Confirmation : Once successfully activated, you'll receive confirmation that your Xfinity Mobile service is ready to use.

If you encounter any issues during the activation process or have questions, Xfinity Mobile provides customer support through their website or customer service phone line. They can assist with troubleshooting and ensuring your activation proceeds smoothly.

Following these steps will ensure that your Xfinity Mobile service is activated efficiently, allowing you to start enjoying its features and benefits promptly.