you can find certain pc software or use command prompt and debug settings and you could possibly find a way, but a lot of the newer phones and especially Verizon phones they tend to block all dialer codes out of it, it's like my flip 5 through T-Mobile, dialer codes work but ultimately I entered and used SamFW and enable the *#73* or *#73# dialer code to enable all bands, plus NRDC & much more.... but yeah besides being Verizon most newer phones tend to be a little more difficult to work with but usually to get your phone to prompt for the network unlock code you just have to either put in another carrier SIM card and it'll prompt for an unlock code rather than trying to figure out how to enter it that's a given as soon as you enter an eSIM or SIM card...if it's a locked phone, it'll prompt for a network unlock code unless it's T-Mobile at which point it'll tell you unable to function and use the built-in unlock app to request an unlock
