I can't registered radio (USIM)

I use WP8548 module and sierra USIM

I finished getting started almost! but… last problem is regisetered radio

when i command

cm radio off
cm data pdp ipv4
cm radio on
cm radio rat GSM
cm radio

i can see this select

  • Not registered and not currently searching for new operator (LE_MRC_REG_NONE)

wait few minutes… it doesn’t change … help i don’t know this problem

Hi @SeongBeom27,

What’s your output from these two commands?

cm sim
cm sim info

Also, what hardware are you using the WP8548 module in?
Is it a mangOH board, and if so, which one (Green, Red)?