Unknown subscriber on g600
ok,, you need to configure your phone,,
go to uk.samsungmobile.com,,,, click on support, its top left,, this takes you to a new page,, scroll down and click u6oo in the box named phone model,,,,this takes you to a new page .
left hand side of page says configure phone,, click it,, it takes you to another page,,,what you need is MMS settings configured, this allows picture messaging,, its top left of the screen,,, just follow the instructions,,, easy peesie,,,, while you are at it,,,set up your WAP settings so you can download tunes , games and ringtones or whatever.
also look for and download PCstudio on this page,,,bottom right,,its good,,,you can manage your pics ,music, vids,, files and stuff from it and download phone stuff to pc or otherway round.
also theres a forum here,, where you can question and answer your phone problems,,