If you have a smartphone, you've probably noticed that it can sometimes get hot when you use it. This is (almost always) normal. Let's see why!
Inside your phone is a processor that’s very similar to the one you’d find in a computer. And just like a computer, when your phone’s processor is working, it generates heat. The more it’s used, the hotter it gets. That’s just a side effect of all the complicated electrical stuff going on inside.
Desktops and laptops use fans, heat sinks, or even water cooling systems to reduce the heat from all the vital electrical chips – both to keep them safe and to keep them running – but phones aren’t big enough to accommodate these bulky pieces of equipment. Imagine how your iPhone would look if it had a PC fan!!!
Since most active cooling methods aren't feasible, phone makers have had to find other ways to deal with the heat problem. First, chips are designed not to generate too much heat. Unless you're putting your phone through its paces for an extended period of time—running games at high graphics settings or doing video editing—it shouldn't get hot enough for you to feel it.
But as phones continue to get more powerful, manufacturers have had to explore other methods to manage heat. Samsung recently made headlines by introducing “water cooling” to its latest phones. Other phones use similar systems.
Be careful though, if it is normal for your phone to heat up, prolonged overheating or when you are not using your phone is a symptom to monitor closely. In this case, contact your phone manufacturer as soon as possible!
Article updated on January 24, 2021 by Byothe
