We've all seen phishing emails - but similar scams that use the mobile phone network are much less common.
But security firm F-Secure is warning of a text message scam that informs the recipient that he or she has won money in a lottery.
The message tells you that you have won a sum of €170,000 (about £135,000) and asks you to send an email to the address gsmn92@yahoo.com.
If you do so, you receive an email that tells you that a cheque for that sum will be dispatched if you agree to pay the deliver fee.
Of course, the scammers ask for a significant sum, though it seems a mere trifle to someone who believes they have just won €170,000.
"Obviously you can't win a lottery if you haven't bought a ticket in the first place," said Mikko Hypponen of F-Secure.
"These guys just want you to pay for the 'courier delivery' of you 'cheque prize'. There is no parcel. Don't fall for this scam," he continued.
www.f-secure.com