When buying a new prepaid card from Syriatel, the card type is Ya Hala Classic, which is the main prepaid tariff that suits a wide range of the society, you can migrate your prepaid card to any other Ya Hala product ( Thawani, Shabab, Aman)
The one year validity the subscriber can keep his prepaid card activated for a whole year in case he traveled or couldn't make any priced operation within 90 days.