For context, work won't provide a phone/sim, wants us to use personal phones. Majority of calls are on Teams anyway but some people still prefer to use mobile.
I don't like having work shit on my personal phone. What's the absolute cheapest way I can set myself up with a work phone?
Can I buy this phone: https://www.kmart.com.au/product/optus-x-start-4-smartphone-…
Activate it once with the cheapest Optus prepaid plan ($10 it appears) and once it runs out of credit just never recharge it again while continuing to receive calls?
If they don't pay for it then they can't expect you to have/use it. Unless its in your contract as a tool of the trade or whatever.