Hello, @MohamedAbdelslam
Thanks for the post.
The RDB3 provides the following network connectors, but not including built-in modems.
chenyin_h_0-1747823221373.png
There are M.2, PCIe, USB, etc. exist on the RDB3, from my experience, devices like WIFI module, LTE/5G module could be connected to the board.
BR
Chenyin