JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = {
	"mobileNumber": "3",
	"userContacts": {
		"values": [{
			"nameValuePairs": {
				"contactName": "aaaaa",
				"contactPhone": "111111"
			}
		}, {
			"nameValuePairs": {
				"contactName": "bbbbb",
				"contactPhone": "222222"
			}
		}]
	}
};

var jsonArray = JSON.parse(data.userContacts.values);

for (var i=0; i<jsonArray['values'].length; i++){
    // here jsonObject['sync_contact_list'][i] is your current "bit"
}