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SMS - (AKA Text Message) GPRS AIRTIME GPRS TARIFFS GPRS RATES GPRS SIMS GPRS CHARGES GPRS ROAMING GPRS COSTS GPRS
What is SMS?
 SMS stands for short messaging service. It's a way to send text over wireless phone systems. The text appears on your handheld's screen, or in the case of a cellular phone, on the phone's display. SMS messages are text messages of up to 160 characters.
No phone call is required to send or receive a text message. In fact, it is possible to send and receive messages on Handspring phones while on a voice call. SMS has been around since 1991, has gained huge usage in Europe and Asia, but has come into widespread use in North America recently. SMS is a universal text messaging system but has come to be associated with its prime adopter, the GSM/GPRS wireless networks.
How SMS works
SMS works on a store-and-forward basis. Instead of being sent directly to the recipient, SMS messages travel through several important nodes before reaching the recipient
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