December 2 news, according to technology website BGR reports, Apple iPhone 4S listed on the first weekend sales reached 4 million units, becoming the fastest selling iPhone ever. According to data released by the market research firm ChangeWave, the iPhone 4S is not only the fastest-selling iPhone to date, it is also the iPhone with the highest level of satisfaction.

A recent ChangeWave study found that 77% of respondents said they were very satisfied with the iPhone 4S, and 19% said that the iPhone 4S is "really good." The satisfaction of the iPhone 4S reached 96%, more than 93% of the iPhone 4. Only 2% said they are dissatisfied with the new phone.

Most people expressed their love for Siri Voice Assistant and upgraded cameras. The areas of dissatisfaction were mainly battery life and lack of support for 4G networks.