Satellite cellular service
In August 2022, T-Mobile US and SpaceX announced a partnership to add satellite cellular service to Starlink Gen2 satellites, and provide dead-zone cell phone coverage across the US using existing midband PCS spectrum that T-Mobile owns.[99][100] Cell coverage will begin with messaging and expand to include voice and limited data services later, with testing to begin in 2023. With Starlink Gen2 sats in low-Earth orbit using existing PCS spectrum, T-Mobile plans to be able to connect by satellite to ordinary mobile devices...
Gen2 Starlink satellites will also include a very large antenna to communicate in the existing midband PCS spectrum, one that will allow cell phone network customers to be able to connect by satellite through their regular mobile devices.
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Wiki
My initial comment was incomplete -- I wasn't clear about the use-case I had in mind. I wasn't referring to making voice calls or text messages, which are very low bandwidth and thus don't require much power from the phone battery.
I was referring to using the phone the way people use a phone today -- as an internet device, for web browsing, social media interaction, posting photos and videos, live-streaming, etc. Those activities require ~100x the bandwidth of a voice call and perhaps 10,000x the bandwidth of a text message. And they require much more power to connect reliably for those higher bandwidths.
The satellite cell services you mention are real, or under development, but check the actual bandwidth they can deliver. You'll find it's not anywhere close to what's required for today's normal phone usage patterns. Can it get there eventually? Probably, I wouldn't bet against Elon Musk.
Sorry for my not being more clear about the use-case I had in mind.