Hi all, When set modem power state to off, all atoms and interfaces except 'org.ofono.Modem' are removed and unregistered. So all APIs execpt 'org.ofono.Modem' can not be used after that. But, when modem power state is off (AT+CFUN=0), some feature should still be available. such as access SIM card(import contact from SIM) and STK. I think maybe ofono should at least keep 'phonebook' and 'stk' atom after set power state to off. best regards, Caiwen