1.What is the size of the SIM this unit takes? Is it a micro SIM?
Answer: Based on the manual picture, it uses a regular sized SIM card. Please check the link provided below:
2.Does this unit have any fallback capability to EVDO if the LTE signal is unavailable?
Answer: No EVDO support but it has UMTS fallback.
3.Are the antenna inputs on the rear of the unit for the WiFi network for LTE? Would I be able to use an outdoor antenna mounted on my roof with this router?
Answer: Antennas are for mobile signals. You can use a different antenna as long as it uses SMA connectors.
Note: Antennas are optional and do not come with the package. Refer in the link provided below and check page 95:
For additional information please visit link below:
I hope that the information provided above would help resolve the problem. Please feel free to contact us again if you will require further assistance.