Satellite messengers with pay-per-message?

I am looking for a satellite messaging device with the following features, can anyone help me find one?
1. (essential) Has no subscription fee, just a fee per message.*
2. (essential) Tells me what my latitude and longitude are.
3. (optional) Has a distress-signal feature like PLBs have.

* or something equivalent, like where I can set up my payment method and just automatically start a monthly subscription when I send a message, or something like that