Basic questions


Hallo every,
I have a mangOH board with WP8548 and I also bought also 3 IoT expansion cards(WiFi, CAN, Ethernet) in the homepage.
I want to test the board and finally use these 3 card to communicate to the other devices.
According to the Instruction I need toat first test the application and try to connect to the mobile networks, then connect Iot Cloud. But I don’t have free SD card so I just skip the secound step and try to connect to the AirVantage, but at last it does not work. Is that the reason I didn’t put the SD card, or there are other reasons?
Is this SD card really necessary for IoT connection? And are there any requires for SD card?

If someone could tell me I would appreciate that.

Thx a lot