That batch of Mykad is old stock loh.

But there's no guarantee the TnG function gonna last till 2025.

I had a PLUSMILES card which on TnG portal the expiry was 2022 (back of the card also 2022). But when I was using it during 2020, the reader on PLUS tol said the card had expired.

No it wasn't dormant, the card was used few times a week.

I even just topped up. When the card reader displayed card expired, there're still RM300+ balance in it.

Since u brought this up, yeah if u brought a dormant card to a TnG counter, like the one next to Sg Besi or Duta Tol. They'll tell u the card is dormant & won't perform topup.

But if u brought the card to merchants using EPAY terminals, like Jaya Grocer, yes it could still be topup.