said by lilhurricane:
A friend recenlt banged theur head for 4 days searching for the same issue.. we probably found what you did, but I'll ask anyways
Is the firmware up to date? What security is enabled..WEP, WPA?
Did you use "Authentication mode" - it may not be compatible
When you manually input the SSID..is it exact? (case sensitive).
Yes the firmware is up to date. WPA2 security is what's enabled. I did manually input the SSID and it didn't work - but I was broadcasting the SSID (unrecognized by the Eris so I wasn't surprised when manual input didn't work.
I did tether my old G router to my current N router and with no security, so (for security) I didn't broadcast the SSID (manual input) and did MAC filtering and the phone recognized it. But they seem to be fighting each other and my other devices are having real trouble now, so I disconnected it for now.
From what I've been able to glean from the forums, this problems is specific to the Eris and not all android phones - they don't recognize wifi with any real security - its some issue with the firmware apparently. I found a jailbreak that claimed to fix the issue but it didn't.
The only solution I can come up with is a dual band router where you broadcast an unencrypted signal at 2.4 Ghz, filter the MAC ID and use that for the phone, along with a 5.0 signal for all other wireless devices.