WiFi "Speed" is Fast but "Upload" is Zero
4.5
You can watch videos fine, but you can't send emails, post to social media, or join video calls.
Symptoms
- Cannot send data
- Video calls fail
- Fast download but no upload
Possible Causes
- Upstream noise on cable line
- Router firewall
- ISP outage
Step-by-Step Fix
1
Check Cable Connections
Ensure the coax cable is tight on both the modem and the wall.
2
Disable Router Firewall Temporarily
See if a security setting is blocking outgoing traffic.
3
Call ISP for "Line Noise" Check
This is often a physical issue with the wire outside your house.
When to See a Technician
Upload traffic uses a different frequency than download; it's possible for one to be "noisy" while the other is clean.
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