Summer Messaging: How To Keep Your Phone Cool In Hot Weather

Essentials to know

• Why phones overheat in summer – Heat from direct sun, intensive apps, charging during use, poor ventilation, and hot environments can slow performance, drain batteries, or cause shutdowns.
• Signs of overheating – Warm to touch, dimmed screen, slower charging, crashing apps, reduced signal, or warnings about high temperature.
• Immediate cooling steps – Move to shade, turn off unused features, close background apps, remove case, enable Airplane Mode, and use gentle airflow—while avoiding freezers, ice, or blasts of cold air.
• Prevention tips – Keep devices shaded, adjust settings for summer, charge carefully, avoid stacking with other tech, schedule heavy tasks for cooler times, and use cooling accessories.
• Business continuity advice – Provide staff with sunshades, power banks, and ventilation tools; encourage cloud backups; keep spare devices; use desktop messaging apps; and have a response plan for heat-related downtime.

In the middle of a heatwave, it’s not just you that feels the pressure – your phone does too. Whether you’re running a business from your pocket or managing a team on the go, an overheating device can mean slower performance, unexpected shutdowns, and even long-term damage. And when you’re relying on your phone to stay connected with customers, track orders or manage WhatsApp Business chats, that’s a big problem.

So, how can you protect your phone – and your business – from the summer heat? Let’s break it down and find out exactly what you should do to keep your phone operating well this summer – plus the phone cooling strategies you should steer clear of.

Why do phones overheat in hot weather?

Modern smartphones are powerful (which is great), but all that power also generates heat (which is not so great). While this warmth may not be such a problem in the winter, during a heatwave, it can cause issues.

How heat affects your battery and performance

High temperatures can cause your battery to degrade faster, and force your processor to throttle performance to avoid damage. That can result in:

• Laggy apps.
• Shorter battery life.
• Sudden shutdowns or screen dimming.
• Disabled features such as camera flash or GPS.
• Reduced signal strength.
• Long-term damage to internal components over time.

Common triggers that make overheating worse

Here are some of the most common causes of overheating in the summer to be aware of:

• Direct sun exposure from leaving a device on a dashboard or outside.
• Running intensive apps such as video calls, GPS, or frequent camera use.
• Poor ventilation caused by phone cases that trap heat, or keeping your device in a tight pocket or bag.
• Charging while in use, especially with fast or wireless chargers.
• Stacking with other warm tech like laptops or spare phones.
• Software bugs, rogue apps, or malware that increase your phone’s background load.
• Third-party chargers that don’t regulate power properly.
• Hot environments, even without direct sun (such as cars, saunas, and kitchens).

Signs your phone is overheating

If you’re worried your phone might be overheating, look out for these common warning signs:

• It feels hot to touch – especially around the back or screen.
• Apps freeze or crash unexpectedly.
• The phone charges more slowly than usual, or stops charging before the battery is full.
• Brightness dims automatically, or the device displays a temperature warning.
• Signal strength drops or data becomes slower.
• Flash or GPS stops working temporarily.

Temperature tip: According to Apple, your phone’s ideal operating range is 0°C to 35°C. Don’t store it above 45°C – which can easily happen in a hot car or on a windowsill.

Immediate steps to cool down your phone

If your phone starts overheating, don’t panic – here’s what to do (and what to avoid):

1. Move your phone to a shaded, cooler spot

If your phone starts to feel hot, move it out of direct sunlight as soon as possible. Ideally, place it somewhere shaded and cool – indoors is best, or in an air-conditioned spot like the glovebox of your car if you’re on the move.

2. Turn off unused features

Turning off features you’re not using – like Bluetooth, Wi-Fi, location tracking, or mobile data – can help take the pressure off your phone. These services constantly run in the background, which adds unnecessary strain and can cause overheating, especially in warm conditions.

3. Close background apps

When you have lots of apps open at once, your phone has to work harder behind the scenes, which naturally produces more heat. To help cool things down, close any apps you’re not actively using.

4. Remove the case (temporarily)

Some phone cases can hold in heat and prevent your device from cooling properly. If your phone is overheating, try taking the case off to help it cool down more quickly. Just be careful to place your phone somewhere secure so it doesn’t get knocked or dropped.

5. Use Airplane Mode in a pinch

Turning on Airplane Mode disables your phone’s wireless connections, which can help reduce its workload and bring the temperature down more quickly. It’s especially useful if you’re in an area with poor signal or just want to give your device a break while it cools off.

6. Fan your phone gently

If you want to cool your phone down more quickly, try giving it a bit of airflow. You can gently fan it or place it in front of a regular fan – but do avoid using an air conditioner directly, as the cold air can cause condensation inside the device. A steady breeze is all it needs to help the temperature drop safely.

What not to do if your phone is overheating:

Don’t put your phone in the freezer or fridge, or use ice – rapid temperature changes can cause condensation inside the device and damage components.

Don’t blast it with cold air from an AC unit – sudden shifts in temperature can cause performance issues or a build-up of moisture inside your phone, which can lead to lasting damage over time.

Long-term prevention tips to stop overheating

Prevention is better than recovery – especially if your team relies on their phones to work outside.

Avoid direct sunlight where possible

Delivery drivers, builders, and tradies – try to keep devices out of direct sun, such as on a dashboard. It’s also a good idea to avoid popping devices into tight trouser pockets in hot weather – your own body heat can contribute to overheating. A loose outer pocket or bag is better for airflow.

Optimise your phone settings for summer

To help your phone stay cool, start by lowering the screen brightness, as a brighter display puts more demand on the battery. It can also help to switch on battery saver or power-saving mode, which reduces processor load and background activity – helping the phone stay cooler while conserving energy. Lastly, try to delay any software updates until later in the day, once the temperature has dropped. Updates can require a lot of processing power, which may cause your phone to heat up during installation.

Be mindful when charging

It’s worth being extra careful when charging your phone in hot weather. Try to avoid fast or wireless charging, as both can generate more heat than standard charging methods. Don’t charge your phone while using it in direct sunlight either, as this can cause the temperature to rise rapidly. Always use a certified charger – cheaper third-party versions may not regulate power properly and could lead to overheating or battery stress. And if your phone does start to feel hot while charging, unplug it and give it time to cool down before using it again.

Keep your phone away from other warm tech

When you stack your phone on top of other electronic devices like laptops or spare phones, it can trap heat and raise the risk of overheating. To prevent this, try to keep your phone separate from other warm tech, giving it enough space for air to circulate and cool it down naturally.

Consider cooling accessories

If you often work outside, it may be worth looking into cooling accessories like heat-dissipating phone cases or small fans that plug into your phone’s charging port. These tools can help regulate your phone’s temperature and reduce the risk of overheating in hot conditions.

Watch out for rogue apps or bugs

Unexpected overheating? Run a quick check for malfunctioning apps, background battery drains, or possible malware. Keeping your system and apps up to date helps avoid hidden performance issues.

Schedule heavy tasks for cooler times

If you need to upload videos or download large files, try doing it early in the morning or later in the evening when the outside temperature is cooler. This can help reduce the risk of your phone overheating during these processor-intensive tasks.

Business-specific advice

Phones are essential tools for many teams – so overheating isn’t just a minor tech issue. It can disrupt productivity, customer service, and order tracking.

How to protect devices for field-based teams

If your team regularly works outside or on-the-go and relies heavily on their devices, try these top tips to help prevent overheating:

• Provide lightweight, ventilated phone holders, or car mounts with sun shades.
• Give employees portable power banks so they can charge their devices without relying on hot vehicles.
• Offer sunshades or dashboard covers for work vehicles to help lower interior temperatures.
• Encourage the use of secure phone lanyards or belt clips to avoid heat buildup from pockets.
• Remind staff to close unused apps and enable battery saver mode during hot weather.
• Share regular tips and reminders using email or internal messaging to reinforce good phone care habits.
• If staff are using their phones for navigation or media playback, recommend that they download maps or music in advance to reduce heat from constant streaming.

Have a backup plan

Sometimes, despite the best of intentions, overheating can still happen. Here’s some practical suggestions to help businesses prepare for phone-related downtime during hot weather.

• Encourage regular cloud backups so no data is lost if a phone fails.
• Consider keeping a spare business device on hand for employees to use if their phone is out of action.
• Use WhatsApp Web or desktop apps to stay connected if mobile devices are temporarily down.
• Assign a tech contact or support lead for staff to report issues quickly.
• Use device management software to monitor battery health and flag issues early.
• Provide training or onboarding for new team members on phone care in hot weather.
• Develop a plan for safe data transfer in case a phone must be taken out of action.
• Encourage teams to report signs of overheating before problems escalate.

When to seek professional help

If your phone keeps overheating even when it isn’t particularly warm, it could be more than just a seasonal issue. Persistent overheating can point to problems with your battery, internal hardware, or even your software.

Here’s when to escalate:

• The device overheats often, even when it isn’t being used much.
• It’s less than 2 years old and still under warranty.
• You’ve already tried all the cooling tips, but overheating is still causing problems.

Check with your mobile provider or phone manufacturer to see if they are able to offer repairs, replacements, or trade-in options.

Keep cool & stay connected

Summer heat doesn’t have to mean summer slowdowns. By taking a few proactive steps – from keeping phones shaded to managing usage during peak heat – you can protect your devices and stay focused on running your business.

And if your phone does need a break? Asynchronous communication tools like WhatsApp Business mean you don’t need to be glued to your phone all day. Set an out-of-office message, reply when you’re ready, and keep everything moving – even in a heatwave.

Looking for a smart, flexible way to separate work from personal life this summer? YourBusinessNumber offers two business-first solutions. You can set up a second virtual number to use on WhatsApp Business – ideal if you want a separate work identity without carrying a second phone. Or, opt for our fast, secure business eSIM solution to add a business number to your existing device. Either way, setup is quick and easy – you’ll receive your new number or QR code by SMS, ready to activate in minutes.