The PinePhone Pro brings upgraded hardware to the Linux phone
arstechnica.com
arstechnica.com
It is not clear how good this product is in power consumption.
Technical specifications at: https://pine64.com/product/pinephone-pro-explorer-edition/
Product details (narrative) at: https://www.pine64.org/pinephonepro/
(Note: .com and .org repositories are separate - they offer different info)
I assume that telephony oriented software - calling and messaging - (extra with respect to usual OS use) works.
One strange thing: in a video I saw an apparently broken Firefox: it did not reflow text (as opposed to a normal desktop FF). This seems to indicate that the project also ships customized software with possibly questionable functionalities or implementation. (I noticed that because it would be nice to be able to use an internet browser on a mobile device... I do not know if new applications emerged in the past few years: with the ones I selected on Android when I needed, visualization was inherently broken and only quick information retrieval was possible, not reading.)