Does GARMIN and IRIDIUM still offering comm service for the DELORME IN REACH model 1.5 ..._

Hmm. Apparently so. These are known as inReach for Smartphones. Support articles here:

https://support.garmin.com/en-US/?productID=585538&tab=topics

The manual shows both the blue one and the green one. No idea which is which.

That said, I would definitely chat or call product support before attempting to activate one. You can do that from this page:

https://support.garmin.com/en-US/?contactOverride=true&productID=585538&tab=topics