I am sharing my journey with IDFC. (WOW Card) May 2023 only this was available -> SB Account 25KMAB Joint July 2023 (Secondary Holder) -> SB Account 25KMAB Joint October 2023 (Primary) -> Applied Via CashKaro got IDFC Millenia/Classic without docs via C2C (Selected Millenia 1.38L)-> SB Account 25KMAB May 2024 -> First Select Account Conversion on June 2024 -> Called the CC asked for Select Card as I was pre-qualified instantly request taken card generated within few hours
I only spend 130rs using my Millenia Card before the upgrade.