Thirty-five megabits per second is the number nobody explains when you sign up for cable internet in Kansas City. That's the upload ceiling on Spectrum's 1 Gig residential plan, buried well below the eye-catching 940 Mbps download figure on the box, and it's the reason my early months of remote work tech consulting involved more stalled screen shares than they should have, before I switched to AT&T. A quick disclosure before anything else: some of the provider links below are affiliate links, and if you sign up through one, I get a small referral fee at no extra cost to you — I only link providers I've actually run in my own house or managed for a client, and I drop the link the day the service quality slips. Fiber versus cable is the question I get asked more than any other from people doing remote work in this metro, and I've written a longer breakdown of that split for anyone who wants the fuller version — this one is specific to the AT&T-versus-Spectrum choice most of my neighbors in the Kansas City suburbs actually face.
For most people here, it comes down to two names: AT&T Fiber and Spectrum Cable. Both will get a laptop connected and a show streaming without complaint. Where they split apart is upload — the direction that matters the moment you're on a video call while a backup job runs in the background — and that split traces back to how each network was built. Spectrum runs on DOCSIS, a cable standard designed decades ago around households downloading far more than they ever sent back out, which is exactly why that 35 Mbps upload number sits underneath an otherwise gigabit-class plan.
My Upload Speed Kept Failing at the Worst Possible Moment
The moment that finally pushed me to do something about it was a system migration call with a client, mid-sentence, when my video dropped to a blur and my voice turned into a robotic stutter. Restarting the router didn't help. Neither did unplugging everything and starting cold. I logged into the router's admin panel and set up quality-of-service rules to push video traffic ahead of everything else on the network, which is the kind of fix that sounds smart on a forum post. It helped, a little — freezing got less frequent. But the upload cap Spectrum sets at the plan level doesn't care what order your router puts things in; QoS can reshuffle the line, it can't make the door any wider. What I was actually fighting, without a name for it yet, was jitter stacking on top of a hard ceiling that had no room left to absorb it.
Upload speed ends up mattering more than the download number on the box the moment two people in the same house are both relying on the connection at once. That single realization is what sent me looking at fiber in the first place.
The Symmetrical Fix Nobody Explains Well
Switching to AT&T Fiber changed the shape of the problem entirely. The headline isn't the download speed — it's that the connection is symmetrical, meaning a 1 Gig plan sends roughly the same number up that it pulls down. Pushing a large log file to a server stopped being a several-minute wait and became something closer to a page refresh. AT&T has leaned hard into building this out, too, with fiber now reaching more than 25 million homes across 21 states, and in the Kansas City neighborhoods where they've actually run the line, the difference between this and cable isn't subtle.
Watching the Upload Bar Turn Green Again
By week five on the new line, my speed log had started looking almost boring, which for anyone who tracks this stuff is the best possible outcome. During a client presentation that ran the full fifty-five minutes, I kept half an eye on the Zoom upload indicator out of old habit, braced for the usual dip. It stayed solid green the entire time — screen share, camera, and all — without a single stutter for either of us to comment on. That's the actual test of an internet plan for remote work: not a speed-test number, but whether you stop thinking about the connection at all during the call that matters.
Two Houses, One Provider, Two Different Speeds
Two doors down, my neighbor Caitlin Fairweather kept the same Spectrum plan I used to have, on the same block, on the same node — and her real-world upload numbers still run rougher than mine ever did, even accounting for a different modem. That's the gap an ISP's online availability checker will never show you. Typing in an address only confirms that a provider's network physically passes your street; it says nothing about how loaded that particular node is or what kind of speed you'll actually get once your neighbors are all streaming and video-calling at the same hour you are. Two houses that technically qualify for the identical plan can land on different segments of the same shared line, and the node's total traffic — not the plan tier — ends up deciding whether an evening call holds steady or falls apart.
Caitlin found this out when her bill jumped without warning, and she's since become the person on our street who reads every clause of a contract before signing anything, highlighter in hand. Billing transparency turns out to matter almost as much as the speed itself — a provider that tells you plainly what your bill looks like in month thirteen is worth more than one that buries it, and I've written separately about the hidden costs that show up in ISP fine print around here specifically. AT&T has gotten better about stating the all-in price upfront, though the equipment rental fee still catches people who don't ask about it directly during signup.
Is Fiber Actually Worth the Switch in Kansas City?
If your work doesn't depend on uploading anything larger than an email attachment, Spectrum is a perfectly reasonable choice, and it's usually faster to get installed. But if your paycheck depends on a stable video call or a cloud backup that has to finish overnight, the calculation changes: fiber stops being a nice-to-have and starts being the thing that keeps a Tuesday from going sideways. A reader named Whitman Zuberi, a retired network director who reads closely, once wrote in to correct how I'd described packet loss on a call — he was right, and I appreciated getting called on it.
It's also worth remembering that fiber and cable aren't the only categories out there. DSL, satellite, and fixed wireless all behave differently under load, and knowing which bucket a plan actually falls into matters more than whatever name is printed on the router. Satellite service is really built as a rural backup answer rather than a daily driver for video calls, and a 5G home internet plan can make a reasonable backup line for a household that already has fiber as its primary connection. Beyond AT&T and Spectrum, other providers are moving into the metro, too — Brightspeed has been expanding its fiber build in 17 states since spinning off from CenturyLink, and Quantum Fiber is worth checking if your address happens to sit inside Lumen's footprint. I've put Brightspeed and Quantum Fiber side by side in more detail for readers in the outlying suburbs where AT&T hasn't reached yet.
How the Numbers Stacked Up After Six Months
From late summer 2025 through this spring, my logged numbers held a consistent shape: AT&T Fiber peaked at 942 Mbps down and 938 Mbps up, while Spectrum's best recorded run was 910 Mbps down and just 36 Mbps up. Average jitter told the same story from a different angle — 0.8ms on AT&T against roughly 14ms on Spectrum, which is the difference between a call that feels solid and one that occasionally makes you repeat yourself.
For my address and my work, AT&T Fiber wins on upload capacity and lower jitter, full stop. Spectrum still earns its place as a backup line or as the only option in blocks where fiber hasn't landed yet, but that 35 Mbps upload cap is worth knowing about before you sign anything, not after the first stalled call. Check what actually runs to your specific address rather than trusting the marketing category — if you're ready to see what AT&T Fiber plans look like at your street, or if cable through Spectrum turns out to be the realistic option for now, both are worth a direct look before you commit to another year of guessing.