So I had a W610i and I just got a W850i and I've got T-Mo...so I go to the configuration page on SE's website, select WAP, choose United States, T-Mo, enter my phone number, it asks me to input the numbers, etc...I get the verification code, but no text is sent to my phone (I've used both 1303####### and just 303#######) with settings. I tried to set up MMS but the SE configurator says there are no MMS setting for my W580i. I tried this with the T-Mo configurator as well, but I'm guessing as to which phone I should select as the 580i is not a choice. I went through this with my 610i as well but I can't remember which phone I unded up using to get the setting sent to me.