I am thinking of upgrading from my 1020, however I am in love with the camera. I am on Tmobile USA with a carrier unlocked 1020, but even with a factory unlocked 1020 I cant get the internet sharing to work. I have a friend with a 1520.3 on Tmobile and the internet sharing works flawlessly. So my question is, have you upgraded from the 1020 to the 1520 and do you think it was a worthy upgrade? was it worth the loss of 20MP?