Java tutorial
//package com.java2s; import android.telephony.PhoneNumberUtils; public class Main { /** * "Flattens" a phone number into a standard format by eliminating all symbols, etc. */ public static String flattenPhone(String formattedPhone) { String flattened = PhoneNumberUtils.stripSeparators(formattedPhone); flattened = flattened.replaceAll("\\+", ""); if (flattened.charAt(0) == '1') flattened = flattened.replaceFirst("1", ""); return flattened; } }