SMS - Short Message Service
Text messaging is a SMS that can be made from a mobile phone (cell phone) to another mobile phone or from and to web based services such as IQC, where you don't need a phone to send an SMS. SMS generally allows the sending and receiving of a maximum of 160 characters although some providers allow more. Most numbers on a phone keypad have letters assigned to them. For instance, the letters for the number 2 are a, b and c. But there are no letters assigned to the numbers 1 and 0. These numbers remain unassigned because they are so-called flag numbers, kept for special purposes such as emergency or operator services. Previously, Q and Z were not included on the keypad, meaning that you could not dial a word such as Quincy. Q is now assigned to the number 7, and Z to number 9.You can also send non-text messages such as ringtones, logos, cards, calendars, clipart and WAP. More than 20 billion text messages are sent per month. In some regions text messaging is referred to simply as TXT and in others as SMS.