That was a great outcome!
I vaguely recollect some Telstra Mobile plans used to have an added or included insurance cover for the life of the plan to help the customer, and also as a big help to Telstra, cover for typical phone warranties only being 12 months while Telstra would only contract for 24 months. Perhaps Telstra were happy to waive the plan if you were recontracting to a new one. I’ve done so midplan previously, providing it was an upgrade and I was recontracting for another 2 years.
Optus and others still try hard to add in an insurance bundle that covers lost, drowning or accidental breakages as part of their sales pitch. No doubt also to help shift the cost burden of phones that fail due to warrantable issues after 12 months from them to you.
Sometimes in the past with mobile sales staff it was all too easy to hear an offer as an inclusion, and sign up to a bottom line without understanding all of what you were paying for. The latest contract forms may have put an end to this, providing we all take the time to review them line by line before signing.