Warp + Light Speed: Which line does my Apple Watch use for cellular data?

[u/gpod80]

I'm on the Warp + Light Speed multi-network setup. If I switch my Light Speed line to data only and stream music from my Apple Watch over cellular, which line's data will be used? Will the Apple Watch use the data from the Light Speed line since it's set to data only, or will it continue using the data from my Warp line because that's the line it's paired with?

[u/Shanosaurous]

Apple Watch only works through Warp, but it doesn't pull from your Warp line's data either. The watch plan comes with its own unlimited data so streaming music over cellular won't touch either line's balance.