I'm starting to think about my IFR check ride and wondered if anyone knew what the current policy was for DPE's "failing" EFB's? Obviously all DPE's are different and there's no way to know for sure what might happen, but just wondered what others experiences were recently. My plan is to take both iPads and my phone for the check ride and have them all updated with the latest maps. Assuming the DPE will fail the first, I'll just turn on my phone and have the second iPad ready including power cords, battery packs, etc. Do you think they would fail all three? Should I have paper backups or would a correct response be to declare an emergency and request vectors to VFR?