Airplane mode and the scheduler disabled, yes (ie. So Apps don't wake up every 5 mins and attempt to contact the network). It's actually required by the qualif

Airplane mode and the scheduler disabled, yes (ie. So Apps don't wake up every 5 mins and attempt to contact the network). It's actually required by the qualification process for lots of carriers. The built in apps have pretty much no polling for this reason. During the qualification test, it's actually connected to both LTE and WiFi, but not actually transferring any data. They cheat a little - the phone is not signed into a Google account, which makes pretty much all Google apps go idle.