Firebase Phone number authentication Error

Question

I am Using Firebase phone number login authentication All things are perfect

1) Provisioning profile

2) certificate

3) Signing methods Enable

Answer 1

It looks like you're not linking your app with -ObjC linker flag, which is part of the instructions for Integrate without CocoaPods.

setFir_authPhoneNumber: is implemented as a category, thus -ObjC linker flag must be used or the compiled .o from the library won't be linked into your app binary.