relatively 
Please correct me if I am wrong (Anyone?)
But as I understand it, a Walkie Talkie would work fine, because its a Throwback Technology. It has no matrix icon. No matrix presence. But a Micro-Transceiver which does have wireless functionality (even if its not running) still has an Icon on the Matrix so long as it is actively running. It simply is not broadcasting via a wireless network, right?
This is how Technomancers and Deckers can hack a device "on" and take control of it, right?
Basically, the only way to not be on the matrix with tech in 2075 is to have tech built which doesn't integrate with the matrix (throw back tech from before the Crash) or to have all of the devices disabled (Switched Off).
As I understand it (and please correct me if I am mistaken) the only thing a Technomancer/Decker cannot do in the modern day and age is take control of your Trodes and FORCE you deeper into the Matrix and I
think that is only because the rules exclusively say that cannot be done. He can still take control of your Trodes and turn them off or feed them other commands, etc.
Basically, (as far as I can tell) your Sam is going to need to have obsolete tech in him (not as bad as you think). I only bring this up because following the Boston Lockdown a lot of people are forced to abandon nanotech and go back to older technologies. So demand for that stuff is going to be high as of 2076+.
Man I love what they've done with Deckers in 5.0, I really do. I'm in the middle of setting up a scam where our decker hacks the firearm of a security agent and makes them shoot me during a misunderstanding so I can launch a civil suit against EVO using one of my fake SINs so I can try to nab a settlement. But thats a story for another time.