Hello Katana-San - many thanks for your note. Battery health is decent (like, 70% or so). Thanks for the link to the apple support page, they had some useful ideas. Still can't receive phonecalls reliably; seems about 1 in 5 (or less) will come through, but mostly they fail, the caller gets to voicemail, but I get no ring on the phone, and no incoming call appears in the log. (VM is full, so callers aren't leaving any msgs; I've told everybody to text me and I'll call them). Also, after the software update (27.0.1 by auto update, now 27.2 at the Apple store), the phone app will frequently freeze, and can only be unfrozen by doing a phone power-down, wait 30 seconds, then power-on. Very frustrating. I suspect a bad software issue (but, wouldn't others be having the same problem?). Or, maybe, is Apple trying to **** off owners of older phones, hoping to sell them new ones? Any thoughts?