People are flooding to social media in appreciation after a TikToker revealed how to find out who an unknown caller is without taking to the internet.
Well, it's not a very 'secret' way anymore, because thankfully we're about to fill you in on the hack.
However, it's slightly annoying when you realise you just missed a call from the delivery man with that parcel you'd been waiting weeks for, or when you realised it was a mate who'd simply changed their number.
There's only so far a Google search can get you, so what else can you do to check if you're being contacted by a scammer, delivery man or a friend who's borrowed a phone off a passerby in a desperate time of need?
Thankfully, TikTok seems to hold the answer - as it does with most things these days.
TikToker Liz Perez took to the platform on 29 July to celebrate her birthday in the best way possible - eating soup and sharing her newfound knowledge on how to combat cold callers or potential hackers.
Perez explains: "So here's a life hack that I never thought about until my best friend just told me about it.
"If somebody texts you and it's a number that you don't recognise, literally just copy and paste the number, post it onto your cash app or Venmo or... Zelle.
"And it's going to show you their last name, every single time. They have to have one or the other. So that's a f**king game changer."
For those of us in the UK, the hack applies to apps such as Paypal too.
Warning: Contains swear words:
Other TikTokers are flooding to the comments to thank Liz for letting them in on the hack.
A user commented: "Literally have been sitting on a bday text for 7 yearsss not knowing who it was till now. thank you LOL."
"Sometimes Snapchat can tell you too ! Just save number as a contact," another added.
However, Liz noted in the comments it isn't a completely foolproof plan.
When one follower noted they 'don't use any of' the apps she mentioned, the TikToker admitted: "It’s only SOMETIMES effective."
Another revealed they'd tried out the hack but discovered the name was likely fake, saying: "I just tried this. They had a gimmick name. Like master Jedi."
A final resolved: "Works 30 percent of the time, every single time."
Well, you may as well go and try it out for yourself.