I recently gave up my Blackberry 7520 through Nextel and purchased a Blackberry Curve 8330 through Sprint. The Curve blows away the old 7520 in battery life, email speed and screen resolution. I admit the voice quality of the phone and the speaker quality are not as high as with the 7520. I've been using the Curve for about 3 months and am extremely satisfied with the device. I strictly use the Curve for business purposes so I cannot comment on the camera or mp3 quality.