calls are transmitted through cell towers.
On some phones you can
American cell phones are the same as English phones it just another term they use.
GSM is a cellular network and mobile phones connect to it by finding other GSM phone in the area. These phones are spread across 212 countries and territories and work whereever there is another GSM phone in the vicinity. The coverage area of each phone is also dependent on the cell size.
It depends on your cell phone. Some phones have an internet tethering option when connected to your computer via Bluetooth or USB.
Cell phones are just radios but they are complicated radios.
Yes you can
No, phones are programmed for the carrier, so if it was a Verizon phone, it was programmed for Verizon. It will not work on another carrier.
No reason why not - providing the phone has sufficient credit to connect the call.
VoIP phones differ from cell phones primarily in that they connect through the internet, rather than via a cell signal. Therefore they do not require any additional phone plan as all the data is covered by your internet plan.
Disposable cell phones is just another way of saying, "pre-paid" cell phones. The phones hold a charge and can be used as a cell phone from a major company, but as soon as a person runs out of minutes or air time, the phone is no longer usable.
Cell phones that do not have a current cell phone plan can usually be used in the case of an emergency to call for help. Smart phones can also be used to do many things like play games and music and connect to the internet using WiFi.
Apart from the phone itself, it has to be within range of a working cell phone tower with capacity enough to take another call.