I'm loving my new Icon. But was surprised that the speaker is definitely a step down from the 520/521. Setting both to the same volume level, the 520/521 is definitely stronger, louder, and clearer. In fact, if you put your hand over the speaker on the 520/521 you can feel the air pulsing against your hand.
That's pretty much the only advantage the 520/521 has but it makes a difference if you don't have earphones nearby. Sometimes i just played music from my 521 in the car through the speaker. It was loud enough even over the noise of driving.
Pretty much my only niggle against the Icon. The only other thing was the heat of the body of phone was a little surprising. It's not always warm but warm when I was doing things I didn't consider stressful.
That's pretty much the only advantage the 520/521 has but it makes a difference if you don't have earphones nearby. Sometimes i just played music from my 521 in the car through the speaker. It was loud enough even over the noise of driving.
Pretty much my only niggle against the Icon. The only other thing was the heat of the body of phone was a little surprising. It's not always warm but warm when I was doing things I didn't consider stressful.