How to Switch to AT&T Fiber from Spectrum, Xfinity, or Cox

Switching Doesn’t Have to Mean a Week Without Internet

The most common reason people put off switching to AT&T Fiber is fear of the process itself — losing internet for days, juggling two bills at once, or getting hit with a surprise charge from their old provider on the way out. Done in the right order, none of that has to happen. Here’s exactly how to move from Spectrum, Xfinity, or Cox to AT&T Fiber without a service gap or a surprise final bill.

Step 1: Confirm AT&T Fiber Is Actually Available at Your Address

AT&T Fiber’s footprint has grown quickly, but it’s still address-specific — one street can have it while the next doesn’t. Before you do anything else, verify coverage using AT&T’s own site or call Telemedia Solutions at (469) 960-3311 and we’ll check your exact address, current plan pricing, and installation timelines in one call.

Step 2: Order AT&T Fiber and Schedule Installation Before You Cancel Anything

Once availability is confirmed, place your AT&T Fiber order and get an installation date on the calendar — but keep your current Spectrum, Xfinity, or Cox service active in the meantime. AT&T Fiber installation typically involves a technician visit and takes a few hours, since fiber requires different cabling than a coax cable line. Don’t cancel your old provider until AT&T Fiber is installed and confirmed working in your home.

A few days of running both services at once is normal and by far the safer path — a short overlap costs you a prorated day or two of double billing, while cancelling too early can mean days without internet if your install date slips.

Step 3: Test Your New AT&T Fiber Connection Before Canceling

After installation, spend a day or two actually using the new connection — streaming, video calls, working from home — before you pull the plug on your old provider. This is your window to catch any issues while you still have a backup connection running.

Step 4: Port Your Home Phone Number, If You Have One

If you have a landline or home phone number through Spectrum, Xfinity, or Cox that you want to keep, don’t cancel your old service until that number has fully ported over. Number porting can take anywhere from a few hours to a few business days. Cancelling your old provider before porting completes is one of the most common ways people accidentally lose a phone number they’ve had for years.

Step 5: Cancel Your Old Provider and Return the Equipment

Once AT&T Fiber is confirmed working and any number has ported, cancel your old service. Then return every piece of leased equipment — modem, router, and any cable boxes — promptly. This is the step people skip, and it’s the single biggest source of surprise final-bill charges.

On the AT&T side, there’s good news: AT&T Fiber’s standard Wi-Fi gateway is included in your monthly price with no separate equipment rental fee, so you won’t be juggling an extra AT&T equipment charge on top of returning your old provider’s gear.

What to Watch For During the Switch

• Early termination fees. Most cable providers no longer lock customers into annual contracts, but check your account for any promotional or bundle terms that might still carry a penalty.
• Final bill proration. Cancelling mid-billing-cycle is normal — most providers prorate the final bill, but confirm the exact cancellation date they’ll use.
• Autopay handoff. Update your payment method with AT&T and make sure your old provider’s autopay is fully turned off so you don’t get double-charged.
• Email or account services tied to your old provider. If you use an @spectrum.net, @comcast.net, or similar email address, check whether you’ll lose access after cancelling and back up anything you need.

Why Switch to AT&T Fiber

AT&T Fiber runs on a 100% fiber-optic network with symmetrical upload and download speeds, no data caps, and no annual contract — a meaningful step up from a shared cable connection, especially if you work from home, upload large files, or have a household full of simultaneous streamers. See the full AT&T Fiber plans and pricing breakdown to find the right tier, or check our AT&T vs Spectrum comparison if you’re weighing whether to switch at all.

How We Verified This

Pricing, plan, and switching details on this page were checked against the providers’ own published materials before publication, and are reviewed when they change. See how we research internet & TV providers, our editorial standards, and why consumers trust Telemedia Solutions.

Frequently Asked Questions

Will I lose internet access during the switch?

Not if you follow the order above — keep your old provider active until AT&T Fiber is installed and confirmed working, then cancel. The only reason to lose access is cancelling the old service too early.

Does switching to AT&T Fiber cost anything upfront?

AT&T Fiber’s standard Wi-Fi gateway is included at no extra equipment charge. Installation involves a technician visit; ask about current installation fees and any promotional credits when you order, since offers change.

Can I keep my home phone number when I switch?

In most cases, yes — but don’t cancel your old provider until the number has fully ported to your new service. Confirm porting status before finalizing the switch.

What if AT&T Fiber isn’t available at my address yet?

AT&T also offers Internet Air, a 5G-based home internet option with a much broader footprint than fiber, as a bridge until fiber reaches your street. Call us at (469) 960-3311 and we’ll check both options for your address.