Many Telstra SIM only plans have big data inclusions and unlimited regional talk and text, and virtually all plans don't have any contracts and low monthly expenses. Higher cost plans also consist of excess call minutes for calls beyond the unlimited 10. If you're on a grandfathered mobile program, you might like to contemplate upgrading to a present plan to benefit from the surplus data blocks. All local cell phone plans will require you to have a SIM-unlocked GSM compatible worldwide phone.