UPDATE: SpotX failures last week
We had a crew member get sick on Tuesday...heat/dehydration. We got him back to feeling pretty good with water and snacks and sent him back to camp. He was instructed to message my SPOT via his SPOT so we could continue to work. My SPOT with direct skyview or very limited tree cover (dead whitebark) failed to send 4 message. After resending them, the messages were not received on coworker's device. Coworker sent several messages stating he was feeling great and was going to take a nap. I never received those. Having not received his messages I walked the 4 miles back to camp to confirm he was good. Coworker received my messages nearly 7 hours AFTER they were sent and I still haven't received his.
5 or 6 years ago we had basic SPOT devices fail to send the "check-in's" repeatedly. I started using my personal DeLorme (preGarmin).
I vote NO CONFIDENCE in SPOT devices. If it's not a Garmin/DeLorme I don't want anything to do with it!!!
I've had the same with the mini inReach, wife was getting my messages the next day...so much for garmin being the savior.
Zoleo hasn't failed to send yet.