Thanks, b23h! I had actually reset the phone and tried to start again, but it didn't go through as I wanted. I managed to get my text messages back somehow. Yeah, no Wi-Fi to start. I hadn't gotten to the Home screen at that point, so I couldn't reach the settings to turn Wi-Fi on and connect. :-/ I remember when I got my 810 how I had to sign up for a Microsoft Live account, but I don't believe it made me sign in afterward.
Now I have other issues. I entered these settings to access T-Mobile's network, but I'm unable to get my cellular data and can't send or receive texts:
APN: epc.tmobile.com (all other fields blank)
Cellular Settings: 3G
Internet APN: epc.tmobile.com (all other fields blank)
MMS APN - APN: epc.tmobile.com
MMSC URL:
http://mms.msg.eng.t-mobile.com/mms/wapenc
MMS port: 80
Max MMS size: 1024 (all other fields blank)
Okay, so that's what I've got. What am I doing wrong that I'm unable to see data or messages??