Beware of Pension card scam SBI

I received a call from supposedly Yono bank manager telling me about Pension card for Govt. employees and that I had applied, if I remember there was an advt on Facebook about it. Then he asked me to download an apk file, my cell phone didn't approve and allow it to be downloaded. Immediately I knew it's a scammer. I blocked and reported it as scam. It seems Facebook is allowing scammers across the world to operate on their platform without checking their authenticity... beware