Add Number to Contact. From https://stackoverflow.com/questions/4744187/how-to-add-new-contacts-in-android
Intent contactIntent = new Intent(ContactsContract.Intents.Insert.ACTION);
contactIntent.setType(ContactsContract.RawContacts.CONTENT_TYPE);
contactIntent
.putExtra(ContactsContract.Intents.Insert.NAME, "Contact Name")
.putExtra(ContactsContract.Intents.Insert.PHONE, "5555555555");
startActivityForResult(contactIntent, 1);