Why does Mobile deduct my traffic and phone bill? .

Well, this kind of situation is often reflected by customers in customer service. In fact, nowadays, mobile phones are more and more exclusive, and many functional softwares automatically run to connect to the network. This is well known, so it will generate a lot of traffic. However, many users will still encounter the same problem as you, that is, why the data traffic fee of mobile phone number is generated under wifi, which is actually very simple. The main reason is that people are not very clear about the functions of mobile phones. For example, iPhone is the most common traffic under wifi. The problem is that the standby phone will automatically switch to gprs, which means that when you touch the phone, your phone works under wifi. However, once your phone is in standby mode, whether you download, buffer or automatically download some software, the phone will switch to gprs, and when you touch the phone again, the phone will switch to wifi. So everyone brings an illusion that they are running traffic under wifi. It is recommended to turn off cellular data when using wifi, so that this will not happen. In fact, it is necessary to scold, sometimes users often complain about operators, and operators are also quite wronged. They take the blame for mobile phone manufacturers, hehe. Another situation is that you find a wifi signal or hotspot in other places (hotspot is to convert the operator's network signal into wifi, for example, your router is a hotspot, and the wired signal is converted into a wireless signal), and the wifi icon is also displayed on the mobile phone, but in fact you are not connected, so you really use the gprs or 3G signal of the mobile phone card, but I feel that no one will make this mistake.