A DIGITAL expert has revealed the warning signs that could mean your partner is spying on you through your phone.
Marc Porcar, CEO of QR Code Generator, says suspicious activity on your device points to monitoring software that tracks messages calls and even your location.

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And he warns that modern spyware stays hidden from users while collecting personal data and sending it to third parties.
Here’s the five signs to look out for that could mean spyware has been installed on your phone without consent.
Battery draining fast
If you notice the battery no longer lasts a full day without a recharge, and you’ve been using it as normal, it might be a sign that a spy app is installed on your phone.
Marc says: “Spyware will drain your battery because it’s continuously running in the background.
“These monitoring apps never enter sleep mode and they need to constantly maintain active connections to send data to the remote server.”
According to the expert, this stealth activity uses significant power and ultimately causes batteries to drain much faster than normal.
Unexpected phone heating
“Phones become hot when spy applications consume processing resources,” Marc said.
Instead of cooling down when idle devices with monitoring software installed often remain warm to the touch even when not in use.
This overheating happens as the spyware makes the processor work harder than necessary during normal operation.
“The temperature increase is in most cases a direct result of unauthorised background processes running on your phone,” Marc continued.
Increased data usage
Marc pointed out that unusual data consumption can also reveal hidden monitoring.
“Check your data usage statistics in your phone settings,” he advised.
Monitoring apps need to send collected information to their controllers which requires internet connectivity and uses data allowances.
“These applications will show up as consuming data in the background sometimes using substantial amounts if they’re sending images or recording audio,” he said.
Many victims first discover spyware when they receive unexpected data limit warnings from their mobile providers.
Strange texts or notifications
“Watch for text messages containing random characters or codes,” Marc also warned.
Some basic monitoring apps use SMS commands to control the spyware installed on a device.
These might appear briefly before disappearing as the software tries to hide from the user.
“If you notice messages that arrive and then vanish or see notifications from apps you don’t recognise these warrant immediate investigation,” he said.
Unusual activity when idle
The final warning sign involves strange behavior when the phone should be inactive.
“Your screen might light up when you’re not using it or you might hear unexpected sounds during calls,” Marc said.
This happens because some advanced spyware allows remote activation of device functions including microphones and cameras.
“These features allow someone to listen to your conversations or view your surroundings without your knowledge – a serious invasion of privacy,” he added.
Marc recommends performing regular security checks on all devices.
“Remove applications you don’t recognise run security scans using trusted software and check for apps with suspicious permissions,” he said.
The digital security expert also noted that it’s important to have strong passwords and keeping devices physically secure when you are around people.
“Never leave your phone unlocked around someone you don’t fully trust, and always have a screen lock”, he cautioned.
UK law considers unauthorised surveillance of another person’s device a criminal offence under the Computer Misuse Act with penalties including imprisonment in serious cases.
Marc added that factory resets offer a last resort solution.
“If you suspect your device has been compromised and can’t resolve the issue yourself, a complete reset will remove most types of spyware,” he said.