Have you been to Tasmania? How's the signal there ?

My first stop this time is to go to Tiandao Island, because my friend went there with a tour group before and said it wasn't very fun. He only arranged 5 days and the schedule was very tight, so he only saw some classic scenic spots. In fact, if you have time, it's best to stay for 7-8 days. There's no signal in the wilderness outside the town, so it's best to download a map beforehand and keep your phone charged. I rented cheap cars, so the cars didn't have navigation maps. I could only connect via Bluetooth to my phone. Once, my phone ran out of power and I couldn't navigate, so I had to wait by the roadside to charge it a little bit before I could go. I suggest everyone bring an extra phone that's only used for navigation. Because I was taking too many photos, I sometimes didn't know when my phone was running low on power. Connecting via Bluetooth was very power-hungry, and even if I was charging it while driving, it wouldn't be enough.