You don't have to turn off your phone to switch SIM cards (but you probably should)

Swapping SIM cards isn't something you'll do all the time, but when it does come up, you should do it carefully.

Swapping SIM cards isn&#39;t something you&#39;ll do all the time, but when it does come up, you should do it carefully.<p><img src="https://www.engadget.com/img/gallery/you-dont-have-to-turn-off-your-phone-to-switch-sim-cards-but-you-probably-should/intro-1791896825.jpg" /></p>