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.
Because a GSM handset uses a SIM card (where the networks information is kept) the phones also have a universally recognised SIM lock placed on them. This lock dictates which SIM cards the phone is allowed to work with. The process of unlocking a GSM phone is then made pretty simple. The SIM lock that each GSM device has is assigned an unlock code when the phone is created. This code is what we or any other unlocking company supply when an order is placed. The phone recognises this code and removes the SIM lock, allowing the phone to accept any compatible SIM card when it is inserted.