Packet loss happens when some data never arrives. Even 1–2% loss can stutter games and freeze video calls because applications must wait and retransmit.
Check Connection Health
Lag spikes often show up as poor ping/jitter during a test.
Run Diagnostic Test →Symptoms of Packet Loss
- Teleporting or rubber-banding in games
- Robot-sounding call audio
- Sudden freezes while speed still looks fine
- Inconsistent ping charts
Most Common Causes
| Cause | Where It Shows Up | First Fix |
|---|---|---|
| Weak WiFi | One area of the home | Move closer / mesh |
| Bad Ethernet cable | Wired devices only | Replace Cat5e/Cat6 |
| Saturated uplink | During uploads/streams | Enable QoS / pause sync |
| ISP / line issues | All devices, wired too | Contact ISP with tests |
Fix Packet Loss Step by Step
- Test on Ethernet to isolate WiFi problems
- Swap cables and router ports
- Update router firmware
- Reduce interference (change channel, use 5 GHz)
- If wired loss persists, contact your ISP
💡 Isolation Trick
If packet loss disappears on Ethernet but remains on WiFi, do not replace your ISP plan — fix wireless coverage first.
Frequently Asked Questions
- What causes packet loss at home?
- Weak WiFi, bad Ethernet cables, overloaded routers, and ISP line issues are the most common culprits.
- Is some packet loss normal?
- Occasional tiny loss can happen, but ongoing loss above about 1% will hurt games and calls.
- Should I try Ethernet first?
- Yes. If loss disappears on a cable, the problem is wireless. If it remains, dig into modem and ISP issues.
- How do I confirm packet loss?
- Watch for high jitter and unstable ping on testspeed.space, then compare wired versus WiFi results.