I probably swap more hotspots every day than anybody. I have under my belt, downloaded, tested and rated
every wifi app and widget available.
The One:
"Wifi Manager" <-free too
by: Kotya Vasilyev
(drops to knees and bows at the mention of creator's name)
I keep this widget at the top front center of my homescreen as the information it displays, and the variables it commands are more vital to me than any other status. On the widget I can toggle wifi on/off, view status, signal strength and see which network I'm currently on.
From that single widget I can hunt and swap networks in literally 3 clicks.
My favorite, most used and most indispensable app!
For anybody having wifi issues, I couldn't recommend this treasure enough.
No adds either.
To troubleshoot your individual wifi connec issues, put the Wifi Manager widget on your desktop, click on it and 'refresh' for networks.
Press your menu button then "radar".
This shows you the various networks' channels and signal strengths. If the network that's giving you trouble is sharing a channel with one or more other networks, log into your router, set it to an unused channel and reboot.
Make sure as many of your router's client configs (b,g,n, link speed, half/full duplex, negotiations, etc...) are set to "Auto" negotiate as possible, as what might be good for one device may be exclusionary to another.
Make sure your router's firmware is up to date etc...
It's also a good idea to remember or note all of your fav protected hotspot's passwords and clear out your wifi history (disconnect and "forget") to avoid conflicts when having connec issues.
I've heard reports that the Evo's wifi was sub-par, but must contend that I have only experienced it's wifi excellence!
And better things are yet to come...
Wireless N on the Evo 4G
HTC EVO 4G Gets Wi-Fi N With Minor Code Tweak