6300 has no system, only smart phones have operating systems. The mobile phone with 2G card must be slow to respond. The standby time is two days. After listening to music for a day, the power will be out after listening for three or four hours. The sound quality is average and the screen display is excellent. 6300 is the main model of Nokia, and it is also a relatively profitable model. Although I use 6300, I have to tell the truth. I think it's better to add 1000 yuan to buy N73, because I prefer to play mobile phones, and I won't get tired of playing smart phones for a year or two. As for 6300, it's still quite loud.