www.mycardintel.com/xfinitymobile Activate : How do I check my Xfinity gift card balance? To activate your One Visa Prepaid card from Xfinity, login into www.mycardintel.com/xfinity. You Must Activate your card upon receipt, You will be offered an option … Continue reading www.mycardintel.com/xfinitymobile Activate : How do I check my Xfinity gift card balance?