Smartphones have been around long enough that we’ve accumulated a thick layer of folklore around them. Advice passed down from friend to friend. Tips shared in comments sections. Warnings that sound authoritative but are based on nothing.

Some of these myths are harmless. Others cost you money, degrade your device’s performance, or leave you less secure than you think.

Let’s clear up the most persistent ones.

Myth 1: Closing Apps Saves Battery Life

This is probably the most widespread smartphone myth. The idea is intuitive: fewer apps running means less battery drain. So you swipe away every app in your recent tasks list, convinced you’re extending your battery life.

The opposite is true.

Modern operating systems are designed to manage apps efficiently. When you close an app, you’re removing it from RAM. But reopening it later requires more power than waking it from a suspended state. The system is already doing the work you think you’re helping with.

Closing apps can actually hurt performance. Each time you force-close an app, the phone has to reload it from scratch the next time you open it, consuming more resources. The only time you should close an app is if it’s frozen or misbehaving.

Myth 2: Don’t Charge Your Phone Overnight

This one has a kernel of truth that’s been exaggerated beyond reason. Older batteries could overcharge and degrade. Modern smartphones, however, have sophisticated battery management systems.

When your phone reaches 100%, it stops charging. It may trickle charge to maintain that level, but it’s not overloading the battery. The phone is smarter than you think.

That said, keeping a battery at 100% constantly does cause some wear. Batteries prefer to be between 20% and 80%. If you want to maximize battery lifespan, avoid letting it drain to zero or sit at full charge for days at a time. But overnight charging isn’t the disaster it’s often made out to be.

Myth 3: Megapixels Determine Camera Quality

More megapixels means better photos, right?

Not really. Megapixels measure resolution, not quality. A 108MP camera can capture more detail, but that detail is only useful if the sensor, lens, and processing are good enough to capture it properly.

What matters more is pixel size, sensor quality, and image processing. A 12MP camera with large pixels and excellent processing will often outperform a 48MP camera with poor optics. Companies market megapixels because it’s a simple number consumers understand, not because it’s the most important metric.

Myth 4: You Should Let Your Battery Die Completely Before Charging

This advice comes from the era of nickel-cadmium batteries, which suffered from “memory effect” and needed full discharge cycles to maintain capacity.

Modern lithium-ion batteries work differently. They have no memory effect. In fact, deep discharges are harmful. Draining your battery to zero puts stress on the cells and reduces their lifespan.

The ideal practice for modern batteries is partial discharges and frequent top-ups. Keep your phone between 20% and 80% when possible. Letting it die completely is something to avoid, not something to aim for.

Myth 5: More Bars Means Better Signal

Those bars on your screen indicate signal strength relative to the tower, but they don’t tell the whole story.

A phone with five bars might still have poor data speeds if the tower is congested or the network is struggling. Conversely, two bars might deliver perfectly good performance if the connection is clean and the tower isn’t overloaded.

Signal bars are a rough estimate at best. They’re useful for comparing relative strength in different locations but not a reliable measure of actual performance.

Myth 6: Don’t Use Your Phone While Charging

This myth has been around since the early days of smartphones. The concern is that using the phone while charging might cause an explosion or damage the battery.

Modern phones are designed to handle simultaneous charging and use. The device manages power distribution intelligently, drawing from the charger rather than the battery when possible.

There is one caveat: intensive tasks like gaming while charging can generate heat. Heat is bad for batteries. But casual use? Browsing, messaging, taking calls? Fine.

Myth 7: Your Phone Charges Faster When It’s Off

Turning your phone off while charging might save a tiny amount of power that would otherwise be used by background processes, but the difference is negligible.

What actually affects charging speed is the charger itself. A higher-wattage charger delivers more power. Fast charging protocols like Qualcomm Quick Charge or USB-PD make a much bigger difference than whether the phone is on or off.

Save yourself the inconvenience. Leave your phone on while charging.

Myth 8: Factory Reset Wipes Everything Permanently

A factory reset returns your phone to its original state, but it doesn’t actually erase the data.

When you perform a factory reset, the phone marks the storage space as available for new data. The old data remains on the drive until it’s overwritten. With the right tools, someone could recover that information.

If you’re selling or giving away your phone, factory reset is a good first step, but for sensitive data, you should encrypt the device first. Enable encryption, then perform the factory reset. This makes the old data unreadable even if recovered.

Myth 9: Higher Refresh Rate Screens Drain Battery Faster

Higher refresh rates do consume more power, but the difference is often overstated.

Many phones with high refresh rate displays use adaptive refresh rates. They adjust the refresh rate based on what you’re doing. Scrolling through social media might use 120Hz. Watching a video might drop to 60Hz or even lower.

The battery impact of a high refresh rate display is noticeable but rarely dramatic. If you’re concerned about battery life, the screen brightness and background app activity will have a much larger effect.

Myth 10: 5G Drains Your Battery Instantly

Early 5G phones had poor battery life because the first modems were inefficient. That’s no longer the case.

Modern 5G chips are far more efficient. And with the introduction of 5G Standalone (SA) networks, connectivity is actually more efficient than older technologies. You may find better battery life on 5G than on 4G in some areas.

Where 5G can drain battery is if you’re in an area with weak coverage. The phone works harder to maintain a connection. But that’s true of any network technology.

Myth 11: You Should Disable Animations for Better Performance

Animations consume processing power, so disabling them should speed up your phone, right?

The difference is negligible. Modern phones have plenty of processing power to handle smooth animations. Disabling them makes the interface feel janky and disjointed, but it won’t make your apps load faster or improve performance in any meaningful way.

This is one of those myths that persists because it sounds logical. But the performance gain is so small that you’ll never notice it. The improved user experience from keeping animations is far more valuable.

The Truth About Smartphone Myths

These myths persist because they sound plausible. They often contain a small element of truth that’s been exaggerated beyond recognition. Understanding what’s actually happening under the hood helps you make better decisions about how you use your phone and, more importantly, helps you avoid spreading misinformation.

Your phone is a sophisticated device. It manages its resources intelligently. Trust it to do its job. You don’t need to close apps, preserve battery, or worry about charging habits as much as you’ve been led to believe.

The real threats to your phone’s performance and longevity aren’t the things you think they are. They’re the things you haven’t considered.