The SIM cards that fit into those tiny slots in your cell phone and tell your cellular network to whom your calls are to be charged come in four different sizes. With the only real difference between ...

自从苹果iPhone 4摒弃了常用的Mini SIM卡而采用Micro SIM卡（俗称小卡）之后，现在越来越多的手机采用了Micro SIM卡的设计。然而很多消费者并没有注意到这一点，选购手机时只关心手机的硬件参数以及外观等，直到买到手之后才发现，自己原来使用的SIM卡不能用 ...

Find out how to trim your own micro-SIM card for use in phones that require this new format. Sharon Profis Former Vice President of Content, CNET Studios As vice president of CNET Studios, Sharon led ...

Got a shiny new 3G gadget with a microSIM slot, but no carriers in your country willing to give you a tiny SIM to put in it? We have good news: Brit iPad owner John Benson took a local (and ...

When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence. Matt Burns is a longtime technology journalist, now Editorial Director ...

For the first time ever in the U.S., T-Mobile is now offering an official micro-SIM card. That’s the precise type of SIM you’d need if you wanted to use, say, an unlocked iPhone 4 on T-Mobile’s ...