[Gta04-owner] Modem off .. less technical question

[Peter]

Hi all,

apologies for this possibly "naive" question.. I am a sysadmin with 
insufficient knowledge of mobile related hardware.

However, I am exploring how useful this project could be for 
security-concerned people as journalists (e.g.)

In some situations these people want to be sure that their phone does not 
spy on them - as well as does not make them trackable.

Here is a question: can you use software to switch off some functionality 
completely, e.g. stopping communication with the mobile network?

Thanks for answers
Peter