Why does Netflix buffer when my internet is fast?

Almost always Wi-Fi distance, congestion, or device-side issues — not the ISP plan. A speed test on the TV (or a phone next to it) usually exposes the real bottleneck.

Will rebooting my router fix buffering?

Sometimes — clearing congested radio state and DHCP leases helps. It's a 60-second test worth running before chasing more complex fixes.

Does VPN cause buffering?

It can. VPNs add latency and route traffic through additional infrastructure, sometimes through congested paths. Try disabling the VPN to confirm.

Should I switch to Ethernet?

For TVs, game consoles, and streaming boxes — yes, when practical. A Cat 6 cable eliminates an entire class of intermittent streaming issues at zero ongoing cost.

How to Fix Video Buffering — Diagnose Before You Upgrade

Fixing video buffering: a low-cost diagnostic workflow

Upgrading the internet plan is the first thing people try and the least likely thing to fix buffering. Most issues live between the router and the screen — and most fixes are free.

Step 1 — measure where the bottleneck is

Run a speed test on a device sitting next to the screen that's buffering. Compare to a wired test if possible. If wireless throughput at the TV is well below the wired number, Wi-Fi is the bottleneck. If both are below the plan rate, the issue is the ISP link.

Step 2 — eliminate easy variables

Reboot router and modem (cold restart, wait 60 seconds).
Restart the streaming device.
Pause other downloads, backups, and large uploads.
Disable VPN if active.
Try a different streaming app or piece of content to confirm it isn't service-specific.

Step 3 — improve Wi-Fi or wire it

Move the streaming device closer to the router or move the router closer to the device.
Switch the device to the 5 GHz band if it's on 2.4 GHz.
Wire it via Ethernet. A single Cat 6 cable to a TV or console eliminates 90% of streaming complaints.
Add a mesh node or wired access point near the affected area.

Step 4 — manage household contention

If buffering correlates with someone else streaming, uploading, or gaming — you're saturating the link. Enable QoS or SQM on the router so no single flow can dominate. See QoS explained.

Step 5 — escalate to the ISP with data

If wired speed tests are consistently below the plan rate, and pings show sustained loss past the gateway, you have ISP-side evidence. Open a ticket with timestamps and traceroute output. Tickets backed by data move faster than 'it's slow'.

Step 6 — only then consider a plan upgrade

If you have multiple concurrent 4K streams plus heavy uploads, and you've eliminated everything else, a higher tier may genuinely help. Use the framework in choosing an internet plan to right-size.