手机卡 meaning in Chinese

sim card
uim

Work for china unicom as a sideline sellsman for four monthes
为湛江中国联通做过四哥月的手机卡销售工作。
Sim card backup
手机卡备份器
If others uses your name , open account additionally , do a mobile phone what to block , these going to need not worry , because these are , want you yourself to sign
另外假如别人用你的名义开账户、办手机卡什么的，这些到不用担心，因为这些是要你本人签字的。
Sometimes sim card can not connect well with mobile phones that the space of card holder is a little bigger , maybe it will cause the mobile reboot , try to stick adhesive tape on the dual sim card to make it more tightly
由于有些手机卡槽比较松,晶片接触时好时坏,导致手机重新启动.可以在双卡上贴上胶布使接触紧密