As a sibling says, this likely won't work for a Nokia feature phone, because it's an integrated design and there's no separate modem.
For a design with a modem module and a ux module, it might possibly just work to swap things out, but it would depend on how VoLTE is supported. If that is all managed by the modem module, then you're probably good.
These modem modules are generally a serial port that speaks Hayes (AT) protocol. Plus some analog lines for mic and speaker. Some 4g modules might be serial over USB and may leave VoLTE entirely up to the application module, that's going go look different.
Some of the modules are a qualcom SoC that runs headless Android. Which works, I guess, but seems bizarre.
For a design with a modem module and a ux module, it might possibly just work to swap things out, but it would depend on how VoLTE is supported. If that is all managed by the modem module, then you're probably good.
These modem modules are generally a serial port that speaks Hayes (AT) protocol. Plus some analog lines for mic and speaker. Some 4g modules might be serial over USB and may leave VoLTE entirely up to the application module, that's going go look different.
Some of the modules are a qualcom SoC that runs headless Android. Which works, I guess, but seems bizarre.