can EM9191 does emergency call ?
I have a system which use “null” nia (integ_protection_algorithm) .
i.e. the system sent null-nia in the SecurityModeCommand from the NAS message.
And, EM9191 sent back a reject.
for a normal UE/phone, if it makes an emergency call (911, i guess ?) , it will accept the null nia.