大家都知道,金属容易被氧化。一些手机莫名其妙的毛病都是由于SIM卡接触不好造成的。例如：SIM卡错误,找不到SIM卡,网络信号不好不稳定,部分手机会出现限制服务,影响通话质量,手机断线等等问题。很多人第一个想到的问题就是自己的手机出毛病了,有的人抱怨××牌手机质量怎么那么 We all know that metal is easily oxidized. Some phone inexplicable problems are caused due to poor contact with the SIM card. For example: SIM card error, SIM card can not be found, the network signal is not good and unstable, some handsets will have limited service, affecting call quality, handset disconnection and so on. Many people think the first problem is their cell phone out of order, and some people complain about the quality of × × brand mobile phone then how