Wio LTE Cat M1/NB-IoT Tracker US connection

If I run the sample code here <LINK_TEXT text=“http://wiki.seeedstudio.com/Wio_LTE_Cat … th-arduino”>http://wiki.seeedstudio.com/Wio_LTE_Cat_M1_NB-IoT_Tracker/#play-with-arduino</LINK_TEXT> It does not connect to the T-Mobile Network. I thought all the info for it to connect was on the SIM. I believe it needs band 20 to connect. Twilio has a huge library that does connect, but shouldn’t it be simpler?

I was finally able to get it connect. I had to set the ASN to “iot.nb”