![]() This simple feature provides good protection, and pulling the SIM card will only cause damage if something malfunctions. The ejection stops all flow of electricity before the card pulls free. That said, modern phone design uses SIM trays with a clever eject sequence. This is why old phones required you to power off the phone before pulling the SIM card. So if the phone is on but not currently being used, electricity is still flowing through many points in the device.Įverything is designed to handle that flow of electricity, so it’s no problem.īut, when you remove a component with electricity actively running through it, it can cause damage to the small and delicate circuitry. Those active currents create magnetic fields that can induce currents in parts of the phone that aren’t active. Your phone has a bunch of electricity running through all of the parts at different times. ![]() The second is software confusion that can impact the phone’s functionality. The first is induced currents that can physically damage a phone. It seems kind of strange, especially since so many phones seem fine when you swap the card. How would changing your SIM card even damage a phone? How Can Changing the SIM Card Hurt a Phone? (2 Things) ![]() If you want to learn all about whether it’s safe to change your SIM card without turning your phone off, then this article is for you. If you’re not sure about your particular model, you can look it up in the user’s manual or just turn off the phone to be safe. Older models with a removable battery normally do require you to turn the phone off. New phones typically do not require you to power them off when you change the phone. Here’s whether you have to turn off your phone to change the SIM card:
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