The TMO uploader dowscales any uploaded pictures to 620px or 19.5KB, whichever comes first. If you want a higher resolution, you need to upload the pics somewhere else and include the link. Which is a major PITA for those of us who neither have nor want an account at one of the picture sharing services. I have used my own website on one or two odd occasions for the purpose but I do not like doing it because of... reasons.