i have an a700 at hand and have just sent no less than 10 pictures to my phone and the quality is great. here is what you do:
(1) Click Messaging (2) Under Messaging click 2 Text Message (3) Click Inbox (4) Open the messages received from firstname.lastname@example.org. (5) Click Options then go (6) Highlight the 2nd link (http://...) and click go
(7) You will be promoted with a "Untrusted Domain" message. Choose " Continue download"
your picture will be downloded to the screen saver section.