On March 21, 2019 Saudi Arabia Telecommunication Authority (CITC) has sent to all customers the following information (in Arabic).
- All WWAN/Cellular devices now must have at least 4G function. (4G is necessary)
- WWAN/Cellular devices must have E-label before being imported in Saudi Arabia.
- If WWAN/Cellular device has no 4G function, it cannot be imported and sold in Saudi Arabia.

Here is the frequency band and technical specification for the 3G and 4G device:
PS: Regarding the e-label, it's only applicable for Mobile phones and tablets devices. Device without screen to put the e-label, should submit a declaration letter to get the waiver.
If you have any questions, please don't hesitate to contact us. Thank you.