I recieved a text claiming to be from Wells Fargo showing the first 4 digits of my debit card number. The message claim to be a notice that my card is frozen due to fraud. I called the number from another phone and the message ask me to enter number 16 digit card number. I hung up because Wells Fargo would not have an automated machine giving instructions on a fraud related matter. It is indeed an effort to gain access to the full account number.