A. If the app ignores the selected ISD code, double-check the settings to ensure that the ISD code is being saved correctly. After selecting the code, navigate away from the settings and return to see if it has been retained. If not, try restarting the app after making the selection.

B. As a temporary workaround, manually enter the full phone number including the ISD code when prompted, even if the app does not seem to recognize it. This may allow you to proceed with the necessary functions.