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Start by checking for an AT&T outage, then restart the gateway and compare AT&T’s gateway speed test with a test on your device. That comparison helps separate a possible connection-to-AT&T issue from weak Wi‑Fi or a problem affecting just one device; it does not, by itself, prove the cause.
1. Check for an outage and inspect the gateway lights
Before changing network settings or buying equipment, check AT&T’s internet troubleshooting page for its outage checker and gateway status-light information. If AT&T reports an outage, follow its updates instead of repeatedly resetting the gateway. If no outage is reported, continue with a restart and speed comparison.
2. Restart the gateway safely
A restart briefly disconnects Wi‑Fi and devices using the internet. AT&T’s restart instructions say to unplug the gateway’s power, wait 20 seconds, reconnect it, and allow it to restart. AT&T’s general troubleshooting page says the process may take up to 10 minutes.
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- Unplug the gateway or hub’s power cord.
- Wait 20 seconds.
- Reconnect power and wait for the gateway to return to service. Avoid unplugging it again while it is restarting.
AT&T also lists restart options in Smart Home Manager for some gateway models. Availability depends on the model; use the power-cord steps if that option is not shown.
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3. Compare the gateway test with a device test
AT&T’s speed test offers two measurements. The equipment test measures between the gateway or hub and AT&T’s network. The device test measures from a phone, computer, or other device to the internet, and may use Wi‑Fi, wired broadband, or cellular.
| Test | What it measures | What a result can help you check |
|---|---|---|
| Gateway or equipment test | Between the AT&T gateway or hub and AT&T’s network | Whether the connection reaching the gateway appears slow |
| Wired device test | From a device connected to the gateway by Ethernet to the internet | Performance without that device’s Wi‑Fi link in the path |
| Wi‑Fi device test | From a device over the home Wi‑Fi connection to the internet | Performance over Wi‑Fi in that location, on that device |
| Cellular device test | From a device using its cellular connection to the internet | Whether the same device can reach the internet outside the home network |
Run AT&T’s equipment test while signed in, then test a device. For a useful comparison, use the same device and location where possible, and note whether it is wired, on Wi‑Fi, or on cellular. A compatible computer connected by Ethernet removes the home Wi‑Fi link from that device’s test; a Cat 6 cable is one optional way to make that connection if the device has an Ethernet port or a compatible adapter.
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If the gateway result is reasonable but a Wi‑Fi result is poor, that points toward a possible Wi‑Fi, location, or device issue rather than proving a fiber-line fault. If the gateway result is also poor, or service remains unavailable after the restart, contact AT&T to investigate the account, equipment, or service. These comparisons help narrow down where to look; they are not a definitive line diagnosis.
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AT&T notes that Wi‑Fi performance can vary with the number and use of connected devices, device age and type, distance from the gateway, walls and floors, building materials, and interference. A weak result in one room does not, on its own, establish a problem with the fiber connection.
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- Test near the gateway, then compare with the room where the problem occurs.
- Temporarily disconnect devices that are not in use and see whether performance changes.
- Consider whether walls, floors, construction materials, appliances, or nearby Wi‑Fi networks may affect the signal.
- Use Smart Home Manager to check Wi‑Fi signal reach and manage network equipment, if available for your service.
AT&T describes these connection factors and its signal tools on its connection optimization page. Check signal reach before considering an extender or mesh system; an added Wi‑Fi device will not resolve an outage, a line fault, or a defective gateway.
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Contact AT&T if an outage is not reported but service remains down after a restart, or if the equipment test remains poor when repeated. Also seek support if the comparison does not clarify the problem or you cannot run a wired test. AT&T’s internet help page provides troubleshooting and repair routes. Its internet support options page is for small-business customers, so residential customers should use the residential support routes instead.
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