Answer by UMANG GUPTA for How to make phone call in React Native?

import {useNavigation} from '@react-navigation/native';import React from 'react';import {Linking,View, Button} from 'react-native';export function LegalScreen() {  const navigation = useNavigation();  return (<View style={{flex: 1, alignItems: 'center', justifyContent: 'center'}}><Button        onPress={() => {Linking.openURL('tel:9873');}}        title="Call Helpline"      /></View>  );}

Just import Linking from react native and add this {Linking.openURL('tel:9873');}in onPress function.You can replace 9873 with any number you want.