I am using the m600i on the Cingular network. Signal strength has been good with GPRS, by reviewing cingulars UMTS coverage map is it supposed to be in my area (SLC) but the phone doesn't connect to UMTS only to GPRS. I am going to call Cingular and see what they say about UMTS.

The only bit of researching I had to do was getting internet connectivity working - I tried all the manual configs I could find and to no avail, but I got it working and here is a few things that may help folks:

- I am an old ATT Wireless customer, which means that unless I get a new GSM card for their Media something service you need to have the mMode service activated for your number. mMode unlimited is about $24.99 a month for unlimited internet activity.

- I couldn't get the manual internet settings to work for nothing, and I tried the auto config service from the main Sony's site, but it didn't seem to like sending a config SMS message to a US number. But I did find this site which does send the config and now the internet WORKS!

sonyericsson.wdsglobal.com/worp/ota/wholesale.tt/sem/wap?step=phone.vm&contractId=12&siteLanguageId=249 &captchaEnabled=true&phoneId=1189
Anyone that is interesting in the manual config reply to this post and I will get it off the phone and post.