Check the logs on the Jetpack after signing into the admin page. See if there are any more details as to what could be causing the Jetpack to power off and share them with us.
Hardware problems will have to be serviced by VZW under the remaining warranty. Service problems might be fixable depending on what is happening.
I own the device and have had others that did the same after many months of use. This jetpack is not used much, and now that i need it falls off of conection. Is there a software update...
Nomatter7326, we understand how important it is to have a reliable device and are sorry to hear of your troubles. Help has arrived! Have you received any warnings or error messages? Does the device lose power or does it go offline?