Dear Win company, My full name is Nhan Ngoc Thien Quan and my phone number is 0942555679 I am a regular customer of your company I am writing to complain about the quality of your product This is a new mobile phone that I bought last 2 weeks In a few days after purchase it has stopped working Firstly, the mobile phone can not access to the internet; Therefore, I can not check my email , get all the news and updates information Secondly, the quality of the sound is poor, so I can not hear incomin.