AT&T Internet Speed Test — Free Fiber & DSL Speed Check

Run a free AT&T Internet speed test to verify the real-world performance of your AT&T Fiber, Internet Air (5G), or DSL connection. This diagnostic tool measures your download speed, upload speed, latency (ping), and jitter in seconds. Once complete, compare your speeds against AT&T's new simplified fiber tiers (from 300 Mbps to 5 GIG). If your results are lower than expected, our guide covers troubleshooting tips, Wi-Fi 7 gateway requirements, and the benefits of AT&T's All-Fi Pro add-on.

AT&T Fiber Plans & Simplified Pricing

AT&T has recently simplified its fiber lineup to just four tiers, giving you more for less without confusing price locks. All AT&T Fiber plans feature symmetrical speeds (equal upload and download) and include the gateway equipment fee and unlimited data in the price.

AT&T Wireless Bundle Savings

If you combine AT&T home internet with eligible AT&T wireless service, you can save up to $420 a year. This is based on a $25/month discount on your internet plan plus the $10/month AutoPay and paperless billing discount. Bundled customers also receive AT&T Internet Backup for free.

The Ultimate AT&T Fiber Troubleshooting Guide (Reddit Sourced)

AT&T Fiber is widely considered one of the best internet services in the US due to its 100% Fiber-to-the-Home (FTTH) architecture. However, even fiber has quirks, mostly related to the AT&T-provided equipment. We've compiled the best troubleshooting tips and technical workarounds directly from network engineers and power users on r/ATT and r/HomeNetworking.

1. The Hardware: Understanding the BGW320

If you've recently signed up for AT&T Fiber, you were likely given the Humax or Nokia BGW320 gateway. This is a very capable Wi-Fi 6 device, but it has some locked-down features that frustrate advanced users.

• Built-in ONT: Unlike older AT&T setups that had a separate little white box on the wall (the ONT) and a separate router (like the BGW210), the BGW320 has the ONT built directly into it. The fiber optic cable plugs straight into the back of the router via an SFP module.
• You CANNOT Replace It: Because the ONT is built-in and authenticated via 802.1x certificates on AT&T's network, you cannot simply unplug the BGW320 and plug the fiber directly into your own equipment (like a Ubiquiti Dream Machine or pfSense box). You must use the BGW320 to authorize the connection.

2. The "IP Passthrough" Tutorial (Using Your Own Router)

Because you must use the BGW320, AT&T does not offer a true "Bridge Mode." If you want to use your own high-end mesh network (like Eero, Orbi, or Asus), you must configure IP Passthrough. Doing this incorrectly results in a "Double NAT," which causes headaches for online gaming and port forwarding.

How to properly configure IP Passthrough:

1. Connect your computer directly to the BGW320 via Ethernet. Leave your personal router unplugged for now.
2. Open a browser and navigate to http://192.168.1.254.
3. Go to Firewall > IP Passthrough. (You will need the Access Code printed on the sticker on the back of the gateway).
4. Set Allocation Mode to Passthrough.
5. Set Passthrough Mode to DHCPS-fixed.
6. Under Passthrough Fixed MAC Address, select your personal router's MAC address from the dropdown list (or type it in manually).
7. Click Save.
8. Crucial Step: Go to the Firewall > Advanced tab and turn OFF all the packet filters (Ping, DoS Protection, etc.). Your personal router will handle the firewall now. Leaving these on the BGW320 limits your maximum throughput and session states.
9. Go to Home Network > Wi-Fi and disable both the 2.4GHz and 5GHz radios on the BGW320 so they don't interfere with your new router.
10. Restart the BGW320, then plug the WAN port of your personal router into the blue 5Gbps port on the back of the BGW320 and power it on.

Pro Tip from Reddit: The IP Passthrough settings in the BGW320 interface are notoriously buggy and sometimes appear "grayed out" or disabled. If this happens, you may need to factory reset the gateway using the pinhole on the back and try again.

3. Bypassing AT&T's DNS Restrictions

One of the most common complaints on r/ATT is that AT&T hardcodes their own DNS servers into the BGW320, and they do not allow you to change them. AT&T's DNS is known to occasionally log queries, redirect mistyped URLs to ad pages, and experience slow lookup times during outages.

To use faster, privacy-focused DNS servers like Cloudflare (1.1.1.1) or Google (8.8.8.8), you must either:

• Use the IP Passthrough method (detailed above) and set the custom DNS on your personal router.
• Manually change the DNS settings on every individual device (your PC, Mac, Xbox, PlayStation, and phone).

4. The Physical Reality of Fiber Optic Cables

If your speeds are dropping from 1,000 Mbps down to 10 Mbps, or the broadband light on your gateway is flashing red, the issue is almost certainly physical.

• No Kinks Allowed: Fiber optic cables use actual light passing through glass. Unlike copper coaxial cables, fiber cables cannot be sharply bent or kinked. If the thin green-tipped fiber cable running from your wall plate to the BGW320 is bent at a 90-degree angle behind a desk, the light is refracting and causing massive packet loss. Ensure the cable is laid out in smooth, wide loops.
• Clean the Tip: If you unplugged the fiber line to move the router, a single spec of dust on the optical tip can ruin the connection. If you must move it, never touch the exposed end of the cable.

5. The "Speed Test vs. Smart Home App" Discrepancy

A frequent post on Reddit goes like this: "The AT&T Smart Home Manager app says I'm getting 1000 Mbps, but speedtest sites on my laptop only say 300 Mbps. Is AT&T scamming me?"

The Answer: No. The AT&T app runs a speed test from their central office directly to the BGW320 gateway itself. This proves that AT&T is delivering the promised 1 GIG to your house. If your laptop is only pulling 300 Mbps, it means your local Wi-Fi environment is the bottleneck. To get the full 1 GIG speed on a device, it must be connected directly to the BGW320 using a Cat5e or Cat6 Ethernet cable.

AT&T All-Fi Pro & Wi-Fi 7

AT&T All-Fi Pro is a premium add-on ($25/mo, or included free with the 5 GIG plan) that provides an ultimate in-home Wi-Fi experience. It includes:

• Wi-Fi 7 Technology: The latest wireless standard for better latency and faster speeds across multiple devices (requires Wi-Fi 7 enabled devices).
• Equipment Upgrade Program: AT&T will proactively alert you when it's time for a free router upgrade (eligible after 12 months, max 1 every 36 months).
• Extended Wi-Fi Coverage: Whole-home mesh extenders included as needed to eliminate dead zones.

AT&T Internet — Pros and Cons

Pros:

• 100% Fiber network delivers highly reliable, symmetrical upload and download speeds.
• Simple pricing: unlimited data, no annual contracts, and equipment fee included.
• Massive savings (up to $25/mo off) for combining with AT&T Wireless.

Cons:

• Fiber is only available in select areas (roughly parts of 21 states).
• Non-fiber (DSL/Copper) areas suffer from significantly slower speeds and older technology.
• The required BGW320 gateway locks down DNS and lacks a true bridge mode, annoying power users.

Competitor Comparison

Related Diagnostic Tools

Ensure your connection is perfectly stable by using our supplementary testing tools:

• Ping Test - Evaluate raw latency and response stability.
• Global Ping Test - Check your latency from routing locations worldwide.

AT&T Internet — Frequently Asked Questions