MC60 - how turn on module without full functionality - all in one solution and I want GNSS part only

Hi, I have a problem with MC60 - in more cases, I need use only GNSS part from MC60. When I turn on module (all-in-one) always module want to connect to network, but I don’t want that. After turn on module, I want use only GNSS part. I send AT+CFUN =4, but before that module had registered to the network and for example SMS was recveved, where I don’t want that any information from GSM network could be received. What I can do, that every time when I want module start without active RF part ? Thanks for any help :).