Huawei Router CPE 5 Model H155-381 Zain version The device is a Zain version and accepts and runs all SIM cards. Works on all companies and frequencies (Mobily, Zain, and STC). Note: The router only works with an external antenna. Important notes regarding the modification option: 1- Modification is only for those who use a MIMO antenna; it will not work without it. 2- Modification means that the built-in antennas inside the router have been disabled, making it work only with the external antenna. The device is almost new, purchased only 8 months ago.