Inmarsat Pro Sat <span class="highlight">Phone</span> No Credit for 4 years on Sim, Ok to call 000

Purchased the Sat phone when Inmarsat charges were reasonable, 3 and 4 years ago went remote with phone with the knowledge that could call 000 if needed with no voucher.

Am wondering if like Telstra if the Sim is not activated for a period that the service is shut down? Cannot see anything to this affect but based upon past pricing experience with Inmarsat I am wary.

This timeout period could also apply to free emails on expired Sims, ie with being able to send a free email message as text to an Inmarsat Pro phone. I think there is a limit of 160 characters including the subject heading. eg:
Send email to 870xxxxxxxxx@message.inmarsat.com (where 870xxxxxxxxx is the IsatPhone PRO mobile number).
Any comments on emails with expired Sims. ( send/receive)

Note if going alone in our Landcruiser with a rooftop mobile phone aerial and a Blue Tick phone with aerial connection, ditto with our Tandem Caravan Mobile phone aerial on top of TV aerial, I will get a voucher. If with a mate in his patrol/van with ditto and both with Epreb's will probably give the voucher a miss.

Appreciate comments

Peter