Comparing the sound quality of N73 and 5700, it is of course 5700. If the N73 is placed at the maximum volume, it will be distorted when taking pictures, and occasionally it will crash. 5700 can be said to be an enhanced version of 3250, and the sound quality of 3250 can never be wrong! From this, we can think of the sound quality of 5700, but when it comes to practicality, N73 is still good, because N73 is a smart phone, and how to choose it depends on your mobile phone application.