The router worked with a prepaid SIM in Hong Kong.

So going to American, I bought a data sim from eiotclub, and it worked on my iPhone.

However, when I put the SIM in the router, it did not work. 

I setup the APN with eiot's instruction hoping to fix the problem, but still failed with the following message:

"Internet Status: Disconnected

Internet unavailable due to no 3G or 4G signal. Please position the antennas upward and place the router in a location where it can get a good 3G or 4G signal reception."

I contacted eIOT, they said their SIM is known to work with all TP-Link routers.

Following is my APN setting and Internet Status:

I have no idea what is wrong, maybe I need to select US Band?  If so, where can I find that on the control panel

Please help me Urgently and I need that for my business trip!  Thx!