This week we upgraded an aging but capable iPhone 6s to an iPhone 12 mini. (Location: Marco Island FL). Call quality is markedly worse on the 12 mini, with sound distortion and drop outs (literally sitting in the exact same spot from which the 6s worked perfectly days earlier.)
Local Verizon store rep says the local 5g tower is being worked on and will be for another 2-3 months! Tried forcing the phone to use LTE, but it made no difference; rep said phone has 5g SIM card so can't be made to use LTE.
As a last resort, I forced the phone to do wifi calling (Airplane Mode On + Wifi On + Wifi Calling On). Calls became perfectly stable and clear, but of course that's a poor work around.
Come Monday our plan is to return the 12 Mini and get 6s reactivated, unless there is a good fix.
