Just my opinion here...If you're planning to hunt by yourself regularly, I would strongly recommend getting a personal locator beacon. They are built specifically as distress beacons with dedicated satellites and more power, the signal goes straight to the national rescue coordination center and when you register it, you can fill in all your medical info so the rescue teams know what to expect.
With the spot-type of devices, they have lower power and the signal goes to their ground station and then their people have to relay the message to rescue services.
The PLB I have doesn't require a subscription, but you can pay to be able send "I'm OK" messages, but it's only one-way.
If you want definitely want two-way communication, then a PLB won't work for you.