Framework tackling phones is useless if they go the mainstream SoC route (Qualcomm, Mediatek) as they don't have the software team needed to make those work properly (I would argue alot of handset manufactures don't either). From what I hear you need a hell of software team to "fix" the garbage Android SDK released for those chips. Most importantly is if they go the closed mainstream SoC route which have EoL SDK support dates then what's the point of building a durable repairable phone at a higher price point when you have to throw it out at the same as everyone else?

I want to see Framework enter the Linux phone market using "open" chips like Rockchip alongside Pine64's Pinephone (Pro) and the Librem 5 as I think they would more likely have the funds, dev time and community support to help bring say PostmarketOS into a usable state then have to rework the SDK. This way the phone's EoL date would be determined be the local phone infrastructure shutdowns. A much longer amount of time.