If possible, I would hook up the Phantoms via Ethernet directly to a router at a friend with a reliable wired Internet connection. My understanding is, that the Phantoms need a stable Internet connection while updating. Maybe this helps.
Innuos Zen Mini MK3 -> (Ethernet / Audioquest Optical) -> Dialog & 2x White Phantom
Pro-Ject Carbon Debut Esprit Turntable with Ortofon Red -> (Cinch/RCA) Musical Fidelity Merlin -> (AudioQuest Optical) to Phantom
Master & Dynamics MH40, Audeze Sine, AudioQuest Dragonfly Red; Remote Control via macOS and iOS devices (Devialet App / Innuos Sense /iPeng / Audirvāna Studio)
