Cell Parts. Your body is made of about 10 trillion cells. The largest human cells are about the diameter of a human hair, but most human cells are smaller -- perhaps one-tenth of the diameter of a human hair.Run your fingers through your hair now and look at a single strand. bacteria is a single, self-contained, living cell. An Escherichia coli bacteria (or E. coli bacteria) is typical -- it is about one-hundredth the size of a human cell (maybe a micron long and one-tenth of a micron wide), so it is invisible without a microscope.
A cellular phone that uses the Global System for Mobile (GSM) network and can access multiple cellular phone service provider networks is called an unlocked GSM phone. A locked cell phone is sold by the cell phone service provider and cannot be used with any other provider.
Some CDMA phones such as the Blackberry Storm and the Blackberry Tour can be unlocked to be used on GSM phone networks such as AT&T, T-Mobile, etc. Cingular, AT&T, T-Mobile, and Rogers Wireless and many other Global GSM Provider worldwide operate on a GSM network.If the phone specifically says guaranteed to work with AT&T for example, the phone is currently locked and will only work with AT&T and the same for T-Mobile and so on.ll these wireless providers, provide you with a sim card upon activation. If you have an AT&T phone and you want to use your current service plan with another AT&T phone, all you have to do is take out your sim card and place it in the other AT&T phone and you can use the phone freel.