The most important rule is actually a matter of course: cell phones have no place in parked cars in summer. In direct sunlight, the temperature can quickly exceed 60 degrees. The battery would overheat, and in the worst case it could even explode.

Heat build-up: remove the covers
The typical silicone covers that many manufacturers include with their devices are very impractical in summer, as they prevent the heat in the device from being dissipated via the back or other areas. It is therefore better to leave the smartphone "naked" in warm temperatures.

Scratch alarm: protect from sand
After a trip to the beach, do not put your cell phone in your bag together with the towel. Otherwise sand particles can scratch the surface. It is better to transport it separately and generally stick a protective film on it. Remove grains of sand with a brush or a damp cloth. Display polish helps with minor scratches, otherwise it is always best to go straight to a specialist.

Water damage: Prevent danger
Even if you have a waterproof smartphone, you should be careful: At the seaside and in salt water, salt can build up in the loudspeaker and input, causing permanent damage to the cell phone. It is best to always use a special waterproof case or alternatively a freezer bag with a zipper. If the cell phone does get wet, store it in rice for at least 24 hours to absorb the moisture. If possible, remove the battery and only switch the cell phone back on when it is completely dry.

Battery heat: Charging correctly
If the cell phone is already extremely hot and the battery is almost empty: first switch to flight mode and wait until the device has cooled down again before charging. This is because charging makes it even warmer and would simply switch off if it overheated.