From 47901e4198f869a71f2860c0b8f1ae1ec708af08 Mon Sep 17 00:00:00 2001
From: Moxie Marlinspike <moxie@thoughtcrime.org>
Date: Mon, 7 Aug 2017 12:40:40 -0700
Subject: [PATCH] Disallow alpha chars in country code field

// FREEBIe
---
 src/org/thoughtcrime/securesms/RegistrationActivity.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/org/thoughtcrime/securesms/RegistrationActivity.java b/src/org/thoughtcrime/securesms/RegistrationActivity.java
index 974ae1b11..b30bafeed 100644
--- a/src/org/thoughtcrime/securesms/RegistrationActivity.java
+++ b/src/org/thoughtcrime/securesms/RegistrationActivity.java
@@ -298,7 +298,7 @@ public class RegistrationActivity extends BaseActionBarActivity {
   private class CountryCodeChangedListener implements TextWatcher {
     @Override
     public void afterTextChanged(Editable s) {
-      if (TextUtils.isEmpty(s)) {
+      if (TextUtils.isEmpty(s) || !TextUtils.isDigitsOnly(s)) {
         setCountryDisplay(getString(R.string.RegistrationActivity_select_your_country));
         countryFormatter = null;
         return;