AT&T Fiber’s 5-Gig plan is the top published speed in Miami ZIP codes today, with Xfinity “Gigabit x2” (2 Gig) and Quantum Fiber’s 8-Gig pilot blocks close behind. But “fastest” also means low lag, strong uploads, and a fair dollar-per-Mbps cost. The step-by-step guide below shows how to use our ZIP-code lookup to pick the real-world winner for your block.
Why Speed Matters in Miami
Miami streams NBA playoffs in 4K, power-trades crypto, and runs smart condos that ping cameras every second. Slow links buffer, drop Zoom calls, and stall e-learning when summer storms hit. A speedy, stable line keeps families, tenants, and small businesses happy for years.
How We Chose the “Fastest”
- Top published tier – We listed each brand’s highest residential speed.
- Fiber first – Fiber outperforms cable and 5G on uploads and ping.
- Crowdsourced tests – We compared Ookla and M-Lab Miami zip-level medians.
- User chatter – We tracked outages on Reddit and our city pages.
- Price per Mbps – A rocket plan no one can afford is not truly fast.
(Data checked 26 May 2025.)
Step-by-Step: Get Miami’s Fastest Internet by ZIP Code
Step 1 – Type your ZIP
Enter your Miami-Dade ZIP (e.g., 33101, 33125, 33180) in the big search bar on InternetInMiami.com. Fiber lines stop street-by-street, but ZIP codes still narrow options fast.
Step 2 – Compare the top tiers in that ZIP
| Provider | Top plan in Miami | Down / Up | Notes |
| AT&T Fiber | 5 Gig | 5,000 / 5,000 Mbps | Widest 5-Gig footprint |
| Quantum Fiber | 8 Gig pilot | 8,000 / 8,000 Mbps | Only in small pilot ZIPs like 33133 |
| Xfinity by Comcast | Gigabit x2 | 2,000 / 300 Mbps | Cable upgrade rolling out |
| Breezeline | Fiber 1 Gig | 1,000 / 50 Mbps | Condo clusters 33141 |
| Verizon 5G Home | Plus | 300 / 20 Mbps | Tower-based, easy install |
| T-Mobile | Plus | 245 / 20 Mbps | Simple flat fee |
| Starlink | Residential | 100-220 / 25 Mbps | Boats, farms, ZIP codes south of 33034 |
(Speeds from provider spec sheets; pilot details below.)
Step 3 – Run three speed tests
Morning, afternoon, and 9 p.m. Average them to see if reality matches ads.
Step 4 – Check upload + ping
Gamers and remote workers need under 20 ms ping and 200 Mbps upload. Fiber wins here.
Step 5 – Read fine print
Look for promo jumps after 12 months, data caps (Xfinity 1.2 TB), and modem rental fees.
Step 6 – Peek at neighbor reviews
Open our ZIP-tagged city pages—Miami Beach 33139, Hialeah 33012, Doral 33172—for outage heat maps and ratings.
Step 7 – Lock a promo
Gift cards, free HBO, or month-to-month price locks often appear when you order online.
Miami Speed Leaderboard (May 2025)
| Rank | Brand | Max plan | Down / Up | Best ZIP clusters | Typical promo price* |
| 1 | AT&T Fiber | 5 Gig | 5,000 / 5,000 Mbps | 33125, 33155, 33180 | $225/mo |
| 2 | Quantum Fiber | 8 Gig pilot | 8,000 / 8,000 | 33133 (Coconut Grove), 33131 (Brickell) | $300/mo |
| 3 | Xfinity | Gigabit x2 | 2,000 / 300 | 33101–33199 entire footprint | $120/mo |
| 4 | Breezeline | Fiber 1 Gig | 1,000 / 50 | 33141, 33140 | $79/mo |
| 5 | Verizon 5G | 5G Home Plus | 300 / 20 | 33172, 33126 | $50/mo |
| 6 | Starlink | Residential | 100-220 / 25 | 33034, 33031 rural | $120/mo |
*Pre-tax; promos verified 26 May 2025.
City-by-City Speed Guide
(All pages linked in brackets are live on InternetInMiami.com and use ZIP search.)
- Miami Beach (33139, 33140) – AT&T 5 Gig lights up West Ave; Xfinity 1.2 Gig covers South Beach hotels.
- Hialeah (33012, 33013) – Xfinity 2 Gig fastest; Quantum Fiber testing 8 Gig near Westland Mall.
- Coral Gables (33134, 33146) – Breezeline 1 Gig in condo towers; AT&T Fiber everywhere else.
- Doral (33172) – AT&T and Xfinity tie at 2 Gig; Verizon 5G tops 300 Mbps around NW 107th Ave.
- Kendall (33176, 33186) – Xfinity 1.2 Gig wide open; T-Mobile 5G a budget play.
- Homestead (33030–33034) – Starlink leads rural blocks; Brightspeed DSL only 100 Mbps in town.
- Key Biscayne (33149) – Quantum Fiber 8 Gig pilot in Mashta Island; Xfinity 1 Gig elsewhere.
List of Fastest Internet Providers In Miami
AT&T Fiber – Fastest Overall
AT&T has upgraded most of its Miami‐Dade backbone to XGS-PON, so more than half of the county’s ZIP codes (including 33125, 33155, 33180) can now order multi-gig fiber. The flagship 5 Gig plan advertises 5,000 Mbps download and upload, with no annual contract or hidden “equipment fee.”
Multi-gig customers receive the BGW-320 gateway, which broadcasts tri-band Wi-Fi 6E and supports wired 5 GbE ports. AT&T also bundles a 12-month Max™ streaming subscription and unlimited data with every 2-Gig and 5-Gig account. The promotional price is locked for at least three years.
What to watch: to see the full 5 Gbps on a speed test you’ll need a PC with a 10 Gbps NIC and Cat 6a (or better) cabling; older 1 Gbps ports top out near 940 Mbps. Power users may want to place the gateway in passthrough mode and run their own multi-gig router for the best LAN performance.
Quantum Fiber – 8 Gig Pilot Blocks
Lumen’s Quantum Fiber quietly rolled out an 8 Gig symmetrical tier in 2024, and small pockets of Coconut Grove (33133) and Brickell high-rises (33131) landed on the pilot list. Customers who qualify can lock in a “Price-for-Life” rate—meaning the monthly fee never rises as long as you keep the plan—plus a Wi-Fi 6E mesh system with no rental charge.
Installs use brand-new XGS-PON ONTs capable of 10 Gbps+, so latency sits in the 2-to-4 ms range—great for streamers and competitive gamers. The catch is availability: Quantum emails invitations to addresses that already have fiber in-building, and appointment slots tend to vanish within days. If your ZIP is still on a 1- or 2-gig cap, keep checking their “gaming speeds” checker every few weeks.
Xfinity by Comcast – Biggest Footprint
Cable giant Xfinity reaches practically every Miami ZIP code. Its newly rebranded Gigabit x2 tier doubles legacy “Gigabit Extra” to 2,000 Mbps down and 300 Mbps up, delivered over DOCSIS 3.1 with the XB8 gateway. The big draw is price flexibility: a 200 Mbps promo often starts under $30 for the first year, and you can stack mobile discounts.
Things to like: self-install kits, vast hotspot network, and frequent bundle credits for Peacock or StreamSaver. Things to hate: the 1.2 TB monthly data cap still applies to cable tiers—unlimited data costs another $30 unless you jump to their fiber lines (rare in Miami). Latency sits around 15–20 ms for gamers—fine, but not fiber-level.
Breezeline – Condo-Focused Fiber Boost
Formerly Atlantic Broadband, Breezeline targets densely populated condo corridors—especially North Beach (ZIP 33141). Their top residential offer is 1 Gig down / 50 Mbps up on coax or 1 Gig symmetrical where fiber feeds the building. New sign-ups get a 3-month HBO + Starz bundle and, for a limited time, a $250 gift card when ordering the gig plan online.
Uploads on coax stay capped at 50 Mbps, so heavy Google Drive or Twitch users may feel crunch. Still, Breezeline’s no-contract terms and condo association partnerships make it the simplest upgrade for high-rise residents who can’t get AT&T fiber pulled to every floor.
Fixed-Wireless 5G Home (Verizon & T-Mobile)
If you rent, RV, or just hate cable installs, 5G Home can be plug-and-play. Verizon’s 5G Home Plus posts typical speeds of 85–250 Mbps down / 10–20 Mbps up across central Miami, with occasional 1 Gbps peaks where mmWave nodes exist. T-Mobile Home Internet averages 134–415 Mbps down / 12–55 Mbps up and costs a flat $50 with no data cap or fees. Both ship a gateway you set up in ten minutes and include price-lock guarantees.
Limits: speeds swing when the nearby cell sector gets busy, and latency (25–45 ms) won’t satisfy hardcore esports players. Still, for single-family rentals or quick startup offices, fixed-wireless beats slow DSL and skips cable deposit hassles.
Starlink – Rural & Marine Pick
SpaceX’s Low-Earth-Orbit network is the only game south of Homestead once the fiber and cable grids thin out. A $599 flat-panel dish and simple roof mount deliver 100-220 Mbps download, 25 Mbps upload, and 40–70 ms ping—good enough for HD streaming and video calls on Redland farms or Biscayne sailboats. Service is month-to-month; pause it when you dock elsewhere.
Remember, heavy summer rain can briefly knock signal strength, and the 1 kg dish needs an unobstructed view of the sky. Starlink also tacks on $15/mo for portability if you roam, so budget accordingly.
Niche & Budget Providers to Know
- Mint Mobile – 5G phone hotspot plans from $15/mo.
- Gen Mobile – Lifeline subsidies; 12 GB hotspot add-on.
- AirTalk Wireless – Free Lifeline phone + hotspot for students.
- XNET WiFi – Bulk apartment Wi-Fi in Downtown lofts (ZIP 33130).
- Easy Internet Now – Pre-paid cable resold in North Miami Beach 33162 motels.
These won’t win speed trophies but keep households online until fiber arrives.
Five Free Ways to Speed Up Your Existing Plan
- Use wired Ethernet. Wi-Fi halves real speed.
- Place router high & center. Fewer walls means stronger signal.
- Change Wi-Fi channel. Pick the emptiest 5 GHz lane.
- Update firmware. Fixes hidden bugs.
- Schedule big downloads at 3 a.m. Network is quiet.
How to Test Speed Correctly
- Turn off VPNs and video calls.
- Plug one laptop into the modem with CAT 6a.
- Run three tests (Ookla, Fast.com, Google).
- Average the results. If under 80 % of paid speed, call support.
Frequently Asked Questions
1. What is the fastest home-internet speed you can buy in Miami right now?
AT&T sells a 5 Gig (5,000 Mbps up & down) fiber tier across much of the county, and Quantum Fiber is testing an 8 Gig pilot in small parts of Coconut Grove (33133) and Brickell (33131).
2. How do I check if these multi-gig plans reach my ZIP code?
Use the ZIP search box at the top of InternetInMiami.com. It instantly checks AT&T, Xfinity, Quantum Fiber, Breezeline, Verizon 5G, and more—no address needed. If fiber shows “coming soon,” re-check every few weeks; crews light up new streets block-by-block.
3. Does Xfinity still have a 1.2 TB data cap?
Yes. Cable tiers include 1.2 TB each month. You can pay $30 extra for unlimited data or add Xfinity Mobile to remove the cap at some addresses.
4. Is fiber or cable better for gaming and Zoom calls?
Fiber wins. Typical ping times sit under 10 ms and uploads match downloads, so games, livestreams, and big cloud backups feel smoother. Cable pings hover 15–25 ms and uploads are lower.
5. What hardware do I need for true multi-gig speed?
A CAT 6a (or better) Ethernet cable and a computer or router with a 2.5 Gbps or 10 Gbps network port. Standard “Gigabit” ports max out near 940 Mbps, even on a 5 Gig plan.
6. How much speed do I really need for 4K streaming?
4K Netflix and Disney+ ask for 25 Mbps per stream. A family of four who streams and games at the same time is comfortable on 300–500 Mbps; faster tiers buy you headroom for future smart-home gadgets.
7. Do hurricanes or summer storms slow fiber?
No. Fiber is glass and stays stable in weather. Satellite (Starlink) and fixed-wireless 5G can drop speed in heavy rain, and power outages will knock every service offline unless you keep the gateway on a battery.
8. How long does installation take?
- AT&T or Quantum Fiber: 2 – 4 hours (drop line, install ONT, test).
- Xfinity self-install: often same day with a cable kit.
- 5G Home gateways: about 10 minutes once the box arrives.
9. Can renters get fiber?
Yes—if the landlord approves the new line. In many Miami condos the fiber is already in the equipment closet, so techs just run it to your unit. Ask building management first to avoid delays.
10. Are there budget plans for students or low-income families?
Yes. Mint Mobile (phone hotspots), Gen Mobile and AirTalk Wireless (Lifeline), and Xfinity’s Internet Essentials all start under $20/month for 50–100 Mbps service.
11. How can I avoid bill creep after a promo ends?
Set a calendar alert for month 10. Call the provider and switch to a new promo, downgrade your tier, or hop to another company—fiber and cable lines run side-by-side in most ZIPs now.
12. When will 10 Gig home service arrive in Miami?
AT&T is already trial-running 10 Gig in Tampa and hints that Miami ZIP pilots could launch in late 2026. Keep an eye on our news feed for updates.
Final Thoughts & Next Steps
Miami is lucky—few U.S. metros have this many multi-gig choices. Today, AT&T Fiber 5 Gig leads the speed race, with Quantum Fiber 8 Gig ready to steal the crown in select ZIPs.
Ready to see your fastest option?
- Enter your ZIP code at the top of this page.
- Compare plans, prices, and perks side-by-side.
- Lock your promo before hurricane season crowds the install calendar.
