When you look something up online - no matter where you look or what you search - you're bound to read a myth or two. Especially when it comes to tech.
From 5G conspiracy theories to radiation poisoning, OnBuy's mobile phone department investigates.
OnBuy started the analysis by conducting a survey* which asked Brits to select the mobile phone myths they believe to be true. These myths roughly break down into three categories: battery myths, security myths and general myths.

Pexels/Tyler Lastovich
Battery Myths
When it comes to mobile phone batteries, OnBuy found the number one thing Brits believe is: apps running in the background use up battery. In fact, 87% of those surveyed believe this is true.
While this is more common sense than myth, it's worth remembering modern smartphones are designed to optimise foreground "tasks" while others harmlessly float in the background.
Another common belief is overcharging a phone damages the battery (39%) or charging your phone overnight is bad for it (34%).
However, contrary to popular belief, modern smartphones contain chips to prevent charge overload. If your phone uses a lithium-ion battery, the current stops once its fully charged.
The battery myths selected by respondents in the survey:
You should drain your battery before charging | 18% |
A bigger battery means longer battery life | 21% |
You shouldn't use your phone while it's charging | 24% |
Charging your phone overnight is bad for it | 34% |
Overcharging a phone damages the battery | 39% |
Apps running in the background use up battery | 87% |

Pixabay/BiljaST
Security Myths
Looking at security, the number one thing Brits believe is: taking out mobile phone SIM cards keeps you from being tracked (75%). This is likely due to what we've seen in the movies. (Hands up if you've seen an action star make an escape and expel their SIM card!)
But it might surprise you to know, sans SIM, your phone can still be tracked by authorities if power remains in the battery!
Other common security myths include that incognito mode protects your privacy (30%) and free Wi-Fi is safe to use (5%).
More and more internet surfers use the incognito or private browsing mode to keep their information safe. But such modes typically protect cookies, passwords and personal data - not overall connection. Often, a user's browsing activity and history is still up for grabs.
Likewise, free Wi-Fi is appealing - especially when you're on the move - but it's worth noting that free Wi-Fi networks are often open and vulnerable.
Hint: if you need to use public Wi-Fi, use a Virtual Private Network (VPN) for additional security.
The security myths selected by respondents in the survey:
Free Wi-Fi is safe to use | 5% |
Incognito mode protects your privacy | 30% |
Taking out your SIM card keeps you from being tracked | 75% |

Pixabay/congerdesign
General Myths
The general mobile phone myth Brits believe most is: you can dry a wet phone in a bag of rice - at 66%!
It's best to err on the side of caution with this one - otherwise you might find yourself in the market for new mobile phone accessories! While rice does absorb moisture, it only works if grains contact the water, which is tricky when moisture is sealed inside your device! Plus, powdery starch can infiltrate cracks and cause corrosion.
To our surprise, a THIRD (31%) of Brits believe a mobile phone has the ability to reduce sperm count/fertility if kept in your pocket.
But let's not panic. Quality mobile phone brands sell products that have passed the SAR (Specific Absorption Rating) test. This ensures your mobile phone does not emit enough radiation to cause concern.
The general myths selected by respondents in the survey:
Mobile phone use near a petrol pump can cause an explosion | 26% |
Smartphones give off dangerous radiation | 29% |
You shouldn't keep your phone in the same pocket as a credit card | 31% |
Having a phone near your private parts can reduce sperm count/fertility | 31% |
Phones interfere with hospitals and planes | 43% |
You can dry a wet phone in a bag of rice | 66% |

Pixabay/dragh
5G
Curiously, when asked "Do you believe all of the 5G conspiracy theories?" (e.g. that 5G will be especially susceptible to cyber-attacks and surveillance), 18% of Brits answered yes. While 63% said no, 20% revealed they are undecided.

Urban Myths
Worryingly, Brits admit they have heard many more myths. Things like 5G will give you cancer, or mobile phone companies listen to all your conversations for "marketing". But the most common urban myths they have heard are:
- You can cook an egg by placing it between two mobile phones - 6%
- Never use a mobile when there's a lightning storm - 19%
- You can charge an iPhone in 20 seconds using a microwave oven - 25%
A full list of mobile phone myths included in the survey can be seen here:
Do you believe... | |
---|---|
Apps running in the background use up battery | 87% |
A screen protector will stop your phone getting scratched | 77% |
Taking out your SIM card keeps you from being tracked | 75% |
More megapixels = better camera | 66% |
You can dry a wet phone in a bag of rice | 66% |
Phones interfere with hospitals and planes | 43% |
Overcharging a phone damages the battery | 39% |
Charging your phone overnight is bad for it | 34% |
You shouldn't keep your phone in the same pocket as a credit card | 31% |
Having a phone near your private parts can reduce sperm count / fertility | 31% |
Incognito mode protects your privacy | 30% |
Smartphones give off dangerous radiation | 29% |
Mobile phone use near a petrol pump can cause an explosion | 26% |
You shouldn't use your phone while it's charging | 24% |
A bigger battery means longer battery life | 21% |
You should drain your battery completely before charging | 18% |
Free Wi-Fi is safe to use | 5% |

*Methodology:
To achieve the results OnBuy.com sent out a survey to 3,446 British people. 50% of respondents that took part are male, 45% are female and 5% identify as "other".