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C3000 Terrible Wifi... "unstable connection" message on any wireless device.
Wired connections are fine and speedy. Wireless connections (even just 1 device at a time) are incredibly slow if ever able to connect. Most phones and laptops show a "network is unstable" or "ready ...
I am also having WiFi issues ever since Comcast updated the firmware to 2.02.06. When connected to modem with ethernet cable speeds are blazing fast. WiFi speeds are generally half what I get when connected with ethernet cable. Was not an issue before firmware update. I have factory reset the modem and fiddled with all of the wireless settings, but nothing improves the WiFi performance.
And before you ask, I have changed the channel - I used the genie interface to see which channels are not being used and tried them. No improvement. And the issue occurs on any device I connect using WiFi. This firmware update is definitely the culprit. WiFi performance was great before the update.
Same problem here with Comcast Blast Pro. Rebooted, changed channel, checked firmware, etc.