Including spaces, text messages traditionally can’t exceed 160 characters. SMS messages often use T9 predictive technology. T9 makes text messaging faster and more efficient on non-QWERTY cell phones without full keyboards.
MMS, which is often used to send pictures, extends upon SMS and allows for longer content lengths. Some cell phones have full keyboards for faster texting whereas others require numbers to be tapped multiple times to achieve a particular letter.
While the bulk of a cell phone bill typically is its voice minutes or data usage, text messages are either included in the voice plan or are added as an extra cost. SMS messaging is used pervasively around the globe.
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