I received this message on my mtn line few minute ago
"dear customer, due to our BVN system upgrade, your ATM CARD has just been de-activated to re-activate, kindly call CBN customer care 08160575315.
The message was sent by this number 08148222707..
Moreover,I register my BVN with my Airtel line and I don't know the relationship with my mtn line,so I know straight away it a scam, I called the man & he asked me to send the digit on my ATM and password. Lol