Can mangoh red communicate with another LTE connected device?

I have mangoh red connected to the sierra wireless LTE network, and I have a hologram cellular module (ublox SARA-R410M) connected to the hologram LTE network, which it is connected to a raspberry pi 3 b+. The pi is setup as the Access Point and configured as an MQTT broker. How can I send sensor data from mangoh red (generic sensors factory installed on it) to the raspberry pi via 4G LTE network? It should work similar to one phone on the sprint network sending a message to another phone on the verizon network.

Can they ping each other