I also noted there is no way to set the APN details using UIFlow.
I see that using M5Burner one can set the apn using the configuration button on Core, but not on UIFlow_Lite.
Any advice to add APN setup and still use UIFlow

@felmue
RESOLVED: I had the sim card backwards. even though there is a big picture of how to insert it, i still inserted it cut-side first out of habit.
Thanks for pointing it out.

Hi, I have tried two different ATOMDTU/NB-IoT modules and two different Sim cards but AT commands show Sim not detected. Any advice?
see details from AT test:

ati
SIM7020G R1910
OK

at+gmm
SIM7020G
OK

at+gmr
1910B03SIM7020G
OK

at+gsn
86151xxxxxxxxxx
OK

at+cgsn
86151xxxxxxxxx
OK

at+cpin?
+CME ERROR: SIM not inserted

See does not detect sim card

also LED status is:
red=on
blue= quick flash once per second

Thanks