Seriously? Why would you be so skeptical of that?
Would you really bring your phone with you, when going out for a beer or coffee, even if it could easily result in you being forced to stay quarantined for 2 weeks?
Is your smartphone really that important to you?
Even though I have personally stayed socially distanced and worn a mask everywhere it was required, it makes perfect sense to me, after seeing how a lot of people have reacted to the pandemic, that a good portion of the population, would let their phone stay at home, so they would not risk a police enforced quarantine.