The display has a separate power switch and has been turned off the entire time I am testing. It is there to support the end product but is not needed for this function so I leave it turned off and monitor through ssh session. I do not believe it is the PS because I am pretty sure I powered it from my 12V power pack (2000Mah NMH) regulated to 5.2V on the USB power connection to the RPi. I will confirm that shortly and let you know.
I am finding some issues with the GSM connection when I take the unit on a road trip; however, this looks to be more like issues with the hologram python SDK. I am working on that now and have no reason to believe that there is any issue with the GSM connection there. BTW; future plans for LTE for the Berry GPS-GSM??? 🙂