4-3 The features and functions of the IoT devices must be described in the device user manual; provided that said manual should indicate which features and functions will be affected if IoT connectivity is limited, interrupted, or unavailable. 4-4 The CST recommends verifying that IoT devices support interoperability with IoT connectivity, and that IoT devices support interoperability with IoT platforms. 5- IoT Connectivity Service 5-1 IoT connectivity service is divided into: 5-1-1 IoT connectivity using wired fixed-line networks. 5-1-2 IoT connectivity using licensed frequency wireless networks, such as mobile communications and satellites. 5-1-3 IoT connectivity using license-exempt frequency wireless networks. 5-2 Only those who have obtained the licenses, issued by the CST, for the provision of the relevant service are allowed to provide IoT connectivity services using wired fixed-line networks or licensed frequency wireless networks. The list of licensed service providers can be found on the CST website. 5-3 IoT connectivity service providers must adhere to “National Numbering Plan” published on the CST website. 5-4 All SIM cards used in IoT devices must be issued by telecommunications service providers licensed by the CST. 5-5 As an exception to Article (5-4), foreign SIM cards used in IoT devices can be used for a period not exceeding 120 days, provided that the following requirements are adhered to: 5-5-1 During said period, foreign SIM cards must be replaced with local cards issued by one of the CST licensed telecommunications service providers. 5-5-2 During said period, these devices must be used for specific pre-defined applications, without providing unrestricted access to the internet. 5-6 IoT connectivity service can be used and provided using license-exempt frequency wireless networks, provided that the following conditions must be complied with: 5-6-1 Only holders of Facilities-Based Unified License or Provision of the IoT Services using License Exempt Frequency licenses are allowed to build WAN using license-exempt frequencies or provide IoT connectivity services using these networks. List of relevant licensees can be found on the CST website. 5-6-2 As an exception to Article (5-6-1), WAN may be built and used via license-exempt frequencies if the coverage is for indoor areas, and for non-commercial purposes, while adhering to the following: 5-6-2-1 Compliance with the regulations and requirements issued by the CST or relevant agencies in the Kingdom. 5-6-2-2 The establishment of these networks shall be carried out by the owner of the indoor area, or by an IoT connectivity service provider holding either one of the two licenses mentioned in Article (5-6-1). 5-6-2-3 Coverage of these networks must not exceed boundaries of the indoor area. 6