Most to all cell phones today will have sms capabilities. Short message capabilities are almost a necessity now with about 70 percent of the population carrying cell phones.
The cell towers allow this to happen. Then all you do is put the number you want to send the text to, and it is like a phone call, except you are just sending a typed message instead.
No. This all depends on which plan you have with your wireless carrier. If "texting" is not a part of your current wireless plan, then you will generally be charged anywhere from .10-.25 cents per...