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Official Comcast Xfinity Customer Support
1-800-934-6489 All Xfinity internet, TV & phone services
schedule 24/7 Support Available — Available 24/7
verifiedVerified Official blockNo Hidden Fees access_time_filled24/7 Support
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Business / Alternate Line
1-800-266-2278 Xfinity Business services
Support available via: PhoneLive Chat24/7 SupportIn-StoreXfinity App
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About Comcast Corporation
Comcast Corporation is headquartered in Philadelphia, PA, and is the largest cable television and internet provider in the United States. The Xfinity brand covers all consumer services including internet (up to 2 Gbps), cable TV (Xfinity X1), home phone, home security (Xfinity Home), and Xfinity Mobile (MVNO on Verizon's network). Comcast serves customers in 39 states with its cable infrastructure.
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When to Call Comcast Xfinity Support
These situations typically require speaking with a Comcast Xfinity representative directly.
- check_circle Your Xfinity internet is completely out and the Xfinity app shows no outage
- check_circle Your Xfinity TV box shows an error code (RDK-03003, XRE-03059, etc.)
- check_circle You have a billing dispute or need to negotiate your Xfinity rate
- check_circle Your Xfinity modem is not provisioning or you bought a new compatible modem
cell_tower Comcast Xfinity Products & Devices Covered
This support number handles service and technical support for the following Comcast Xfinity products.
cell_tower Xfinity Gateway (xFi Advanced)
cell_tower Xfinity xFi Pod mesh extenders
cell_tower Xfinity X1 cable box
cell_tower Xfinity Flex 4K streaming box
cell_tower Xfinity internet plans (10 Mbps to 2 Gbps)
cell_tower Xfinity Mobile phones
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Common Comcast Xfinity Issues
The most-reported Comcast Xfinity problems and what to expect when you call for each.
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Internet not working
No internet despite router showing connected to Xfinity
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Xfinity TV error codes
X1 box showing RDK, XRE or similar error codes
chevron_right account_circle
Account login problems
Can't sign into Xfinity.com or the Xfinity app
chevron_right data_usage
Data cap exceeded (1.2 TB limit)
Speed throttled after hitting Xfinity's monthly data cap
chevron_right router
New modem not activating
Own modem purchased not activating or being recognized by Xfinity
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Fix It Yourself
Try these steps before calling. They resolve the majority of common Comcast Xfinity issues.
1
Use the Xfinity app for fastest support
The Xfinity app (iOS/Android) lets you restart your modem remotely, check for outages, pay bills, and chat with support. Restarting via the app triggers a true remote reboot — often faster than using the xFi admin panel at 10.0.0.1.
2
Restart your Xfinity modem via the app
Open the Xfinity app → Internet → Restart this device. This performs a proper reboot cycle. The modem will take 2-4 minutes to fully come back online. Don't unplug it during this process.
3
Buy your own modem to eliminate $14/month rental fee
Xfinity charges $14-25/month to rent a modem. A compatible DOCSIS 3.1 modem like the Motorola MB8600 or ARRIS SB8200 costs $100-180 and pays for itself within a year. Check compatibility at xfinity.com/compatibledevices.
shield Warranty & Coverage
Xfinity-rented gateway equipment is covered for repair or replacement at no charge during your service. Xfinity Mobile phones include a 1-year manufacturer warranty. Purchased accessories include standard manufacturer warranties.
quiz Comcast Xfinity FAQ
Common questions answered by our research team.
add Does Xfinity have a data cap?
Yes, Xfinity enforces a 1.2 TB monthly data cap in most areas (not available in states with data cap bans). Exceeding the cap costs $10 per additional 50 GB, up to a max of $100 in overage fees. Unlimited data add-on is $30/month.
add How do I cancel Xfinity service?
Call 1-800-934-6489 or visit an Xfinity store in person. Xfinity does not allow cancellation via chat or online. Monthly customers can cancel anytime. Promotional contract customers may owe early termination fees — ask your representative about your specific terms.
add How do I check for Xfinity outages?
Go to xfinity.com/support/status and sign in for real-time outage maps at your service address. The Xfinity app also shows outage alerts automatically. Xfinity also sends text alerts to your account phone number during service outages.
add What is Xfinity xFi and xFi Advanced?
xFi is Xfinity's Wi-Fi management platform through the app, providing device management, parental controls, and security. xFi Advanced (included with xFi Gateway rentals) adds xFi Pods for mesh Wi-Fi, advanced security, and unlimited data.
add What is Xfinity Mobile?
Xfinity Mobile is an MVNO (virtual carrier) that uses Verizon's wireless network and Xfinity Wi-Fi hotspots. It's available exclusively to Xfinity internet customers. Plans start at $15/month per line for 1 GB, with By the Gig or Unlimited options.
business_center Comcast Xfinity Business Support
Comcast Business provides fiber, ethernet, and managed IT services for small to enterprise businesses with dedicated business support and faster SLA response times than residential service.
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Business Line: 1-800-266-2278