This number shows up on screen and it is the legitimate number for Walmart Mastercard if you call it back...but I believe that if you answer it when it calls you it connects you to a bogus and phishing caller who is using Walmart's legit number to hide their real number and therefore the possible scam and phishing on the call if you were to answer...I also spoke to Walmart Mastercard and they informed me that they do not call from this number on outbound calls so the number should not be popping up when a legit call from them comes in
Caller: Walmart Mastercard