SIM card , Telstra do a SMS package that debits your bank account. You need that one. Vodafone also do them. $5/ mo or so.
Warranty taken care of by the local dealer there. Warranty work won't be required though as these do not break regular maintenance on it though will be required. The pin switches do corrode over time. The rest though is solid.
If you have questions - call me. I'm not on here daily as currently I do not get time to.
I average 100-200 calls a day and barely get time to get jobs done. (Phone is getting set to divert once this trip starts)
Email is the other way to get me.