STC Fiber Optic Representative Subscription Offers up to 30% off for the first two months. A box must be available in the same building for all operators: Mobily, Zain, Salam. Subscribe to STC Fiber Internet now and say goodbye to problems – experience unlimited internet! 5G Internet packages are available with a 3-day trial. Mobile open 5G Internet packages are available with a 3-day installation trial, instant and free. For inquiries: ( Phone number appears when clicking the contact button ) We testify to the credibility and speed of service.