Abstract: SMS is an abbreviation for Short Message Service. It is frequently referred to as SMS messaging or “texting” as well. SMS is a technique by which text can be sent to a mobile phone via. other mobile phone, smart phone or tablets with GSM service. There are three problems in Arabic SMS first, Arabic language has cost twice more than another Latinas SMS (English), since, it has only 70 characters per one SMS while the Latinas SMS has 170/1 SMS. Second, most of the cell phone services providers are out of the country that use their services, the providers may be show the content of the SMS in additional to the probability of going the SMS to wrong side (number) accidentally. Third, the phone service sometimes be very bad since network overload especially in some events related to all people or some of them. So, the recipient will receive “some of the text is missing”. This study proposes a system depends on the encryption to solve the above problems. The system applied on many types of smart phones and the experiments show that the proposed system was able to decrease the cost of the Arabic SMS to the half rate and it also succeed to increase the safety and the security of the Arabic SMS in addition to improve the services of the phone and decrease probability of receiving “some of the text is missing”.