I received an email warning me about a scam where an 'engineer' phones your mobile and asks you to press #90 or #09. The email says they will then have access to your SIM card and be able to make calls at your expense. Is this true?
No. This urban myth began as a genuine email from a police officer in England to his business and community contacts. It turned out to be a hoax but continued to spread years after the event. If you receive unsolicited emails, always read them carefully. Double-check the information is still valid by searching the internet before forwarding them to friends, otherwise they can go on needlessly feeding people's fears.