How to find phone number on mobile broadband sim card?

[11vsam]

I have a 4G Mobile pre-paid Wi-Fi device I haven't used in a few years.  I want to re-charge it but can't remember the phone number.  How do I find the number?

I can't put the sim into a phone as the sim does not fit the phones that I have.

Tried Telstra Chat but that was of no use.  Tried calling but again, no use....can't get through.

I live too far from a store to pay a visit in-store.

[Jupiter · Accepted solution]

If you haven't used it in a few years, then the SIM won't work anymore as they are disabled (cancelled) 6 months after the last recharge expires. You will need to get a new SIM starter pack.