Xfinity Mobile requires residential post-pay Xfinity Internet. Line limitations may apply. Equip., intl. and roaming charges, taxes and fees, including reg. recovery fees, and other charges extra, and subj. to change. $25/mo. charge applies if Xfinity TV, Internet or Voice post-pay services not maintained. Pricing subject to change. During times of network congestion, your cellular data speeds may be slower temporarily. After monthly data use threshold for a line is exceeded, speeds are reduced until the billing cycle ends. A minimum $20.00 charge applies per month, per account for By the Gig lines, regardless of data usage. Charges apply to each GB or partial GB of shared data. No rollover data. For Xfinity Mobile Broadband Disclosures visit: https://www.xfinity.com/mobile/policies/broadband-disclosures , How to switch carriers and port your number Steps to switching and porting your number Once you have decided which carrier, plan, and cell phone you want to go for, the process to transfer your phone number is straightforward: Check your eligibility with your new service provider., Looking to switch mobile carriers? Find what to look for when switching phone carriers and a step by step guide on how to change cell phone carriers..