How to Switch from Cable to Fiber Internet: Complete Migration Guide
Switching from cable to fiber is usually worth it if the price delta is under $20/month. Here is the full checklist, including the gotchas cable companies will not tell you about.
Updated April 2026
Rule 1: Never cancel cable until fiber is live.
Keep cable active for 3-5 days after fiber installation. The incremental cost is negligible. An installation delay or ONT configuration issue can leave you without internet if you cancelled too early.
Before you order fiber
Verify fiber is actually available at your address
Check att.com/internet, verizon.com/home/fios, frontier.com, or the FCC map. Do not order based on marketing; confirm address-level availability.
Check for early termination fees on your cable contract
Most cable plans have no contracts, but some locked-in promotional rates have ETFs. Typical: $10 per month remaining. Factor this into the value calculation.
Audit your ISP email usage
If you have a comcast.net, xfinity.com, att.net, or verizon.net email address, identify every account that uses it. This is often the most time-consuming step. Plan 2-4 weeks for email migration.
Note your current wifi network name (SSID) and password
Your smart home devices, thermostats, cameras, and printers are all connected to your current wifi name. You will need to reconfigure these, or use the same SSID/password on your new router.
Order fiber and schedule install
Order fiber and get a specific installation date
Professional installation is required. Do not cancel cable until you have a confirmed date.
Schedule the install for a morning on a flexible day
Installations take 2-4 hours. Morning slots minimize delay risk from earlier jobs running over. Choose a day you can be home.
Ask about the ONT placement
The technician installs an ONT box where the fiber enters your home. Discuss placement in advance. Interior locations are preferred for aesthetics; exterior is easier to run.
Migrate email before install day
Create a Gmail or Outlook account
Move to an email address you own and keep regardless of ISP. Gmail and Outlook are both free and portable.
Update your most critical accounts first
Bank, work, healthcare, then work through secondary accounts. Use your email search to find all accounts by searching for the ISP domain in your inbox.
Set up forwarding from your ISP email
Most providers allow forwarding for 30-90 days after cancellation. Comcast does; AT&T does not. Verify with your provider.
Installation day
Test fiber speed before the technician leaves
Run a speed test (fast.com or speedtest.net) while the technician is still present. Confirm you get speeds close to your advertised plan.
Check wifi reach through your home
If you are using the fiber provider's gateway, test wifi signal in every room you care about. Note dead zones for mesh router planning.
Run both cable and fiber for 3-5 days
Keep cable active during this period. If fiber has issues, you have a backup. Cancel cable only after fiber has been working reliably.
Cancel cable
Call to cancel, not online chat
Cable retention departments are aggressive via chat. A phone call is faster for final cancellation. You will get a counter-offer. Have your fiber speed and price ready to decline.
Get a cancellation confirmation number
Ask for a confirmation number or email confirmation. Screenshot it. This protects you against billing disputes.
Return equipment within 30 days
Return rented modems and routers to a UPS store or provider store. Take photos of the equipment serial numbers. Get a receipt. Keep it for 90 days.
After cancellation
Check your final cable bill carefully
Cable providers routinely bill for a final partial month or charge for equipment not yet returned. Common dispute triggers: equipment charged before return was processed, billing cycle cutoff confusion.
Dispute any incorrect charges promptly
Call within 30 days of the final bill. Have your confirmation number and equipment receipt. Most incorrect charges are reversed when you have documentation.
Consider a mesh router for whole-home coverage
Fiber's ONT provides a single ethernet port. If your home is large, a mesh wifi system (Eero, Google Nest, TP-Link Deco) distributes coverage. Budget: $100-300.
Common Migration Gotchas
Comcast retention reps will typically offer $20-40/month off your current plan. Evaluate honestly. The discount usually lasts 12 months and then your cable bill is back. Long-term, fiber is usually the right choice if priced within $20 of the retention offer.
Spectrum does not use promotional pricing, but they regularly increase base rates. Do not assume your current rate is locked. Check your past bills for rate changes.
Comcast has a known pattern of charging for equipment even after it has been returned to a UPS store. Always keep the UPS receipt with the tracking number. If charged, provide the receipt.
AT&T does not maintain legacy att.net or sbcglobal.net email addresses after service cancellation. There is no forwarding option. Migrate email before cancelling.
Many cable promotional rates include an autopay discount ($5-10/mo). When you cancel, the final bill may not include this discount. This is technically correct but can catch customers off guard.
Bring Your Own Router
Fiber providers allow you to use your own router in most cases. The ONT provides a standard ethernet handoff. Benefits: no equipment rental fee, better performance, own your hardware. Recommended setup:
- +Single-device home: Any wifi 6 router ($80-150)
- +Standard home: Eero Pro 6E 3-pack or TP-Link Deco XE75 ($200-300)
- +Large home / power user: UniFi or Netgear Orbi 960 ($400+)
Note: AT&T requires their gateway for authentication on some plans. Verizon and most others support third-party routers.