Claims to be connected to the network (all bars up). However try to make a call and you're told it needs the SIM inserted.
SMS send/receive OK, so the phone is talking bollocks. (Found this out when I went to log into her online account and it sent a 2FA text to the phone which is received - then I tested sending ....)
Have tried all the tips - reboot, safe mode, cleaning SIM tray and card.
SIM works OK in another phone.
Apparently the phone is (just) in warranty, but I'm suspecting that'll be a 6-week wait situation ... annoyingly SWMBO relies a lot on the phone because of the screen size (she's partially sighted).
Have I missed anything obvious.
Completely stock Android etc.