SBI CC conversion

I currently hold SBI simply save and cashback, i dont have much use for simplysave, i was thinking of getting phonepe sbi select black cc. Should i reach out to customer care and ask them to upgrade my simply save to phonepe black and will I have to apply for it from phonepe application. Also which card Phonepe variant would be better, SBI or HDFC?

( I dont own any HDFC CC)