A number of scam SMS messages are currently in circulation. The message may ask you to call back a number. This is an international number.
Three has blocked the source of these messages from the network and has also blocked the number you are requested to call back so that there should be no financial impact on our customers. Three has made the relevant authorities aware of the spam. As always Three would advise customers to be vigilant in calling or replying to text messages if they are not sure they are genuine.