Crear un contacto en Ionic con plugin

contacts.ts

import { Contacts, Contact, ContactField, ContactName } from '@ionic-native/contacts/ngx';

misContactos: Contact[] = [];

    constructor(
        // tslint:disable-next-line: deprecation
        private contacts: Contacts
    ) { }

importarContactos() {
    const opciones = {
        filter: '',
        multiple: true
    };
    this.contacts.find(['*'], opciones).then((contacts: Contact[]) => {
        this.misContactos = contacts;
        console.log('Contactos', contacts);
    });
}

crearContacto() {
    const contact: Contact = this.contacts.create();

    contact.name = new ContactName(null, 'Nava', 'Mario');
    contact.phoneNumbers = [new ContactField('mobile', '7771345756')];
    contact.save().then(
        () => console.log('Contacto guardado!', contact),
        (error: any) => console.error('Error al guardar contacto.', error)
    );
}

// En el archivo .html
<ion-button (click)="importarContactos()" expand="full" shape="round">
    Importar Contactos
</ion-button>
<ion-button (click)="crearContacto()" expand="full" shape="round">
    Crear Contacto
</ion-button>
<ion-list>
    <ion-item *ngFor="let c of misContactos">
        <ion-label>
            {{ c.name.givenName }} <strong>{{ c.name.familyName }}</strong>
        </ion-label>
    </ion-item>
</ion-list>