Fix number and phone keyboard visual glitches

Bug: 18179572
Change-Id: I387b965ed4f7adc5a34b63e622520e3c88ffd5ca
diff --git a/java/res/xml-sw600dp/rows_phone.xml b/java/res/xml-sw600dp/rows_phone.xml
index 612397a..e598c96 100644
--- a/java/res/xml-sw600dp/rows_phone.xml
+++ b/java/res/xml-sw600dp/rows_phone.xml
@@ -113,7 +113,8 @@
             latin:keyStyle="numStarKeyStyle"
             latin:keyXPos="31%p" />
         <Key
-            latin:keyStyle="num0KeyStyle" />
+            latin:keyStyle="num0KeyStyle"
+            latin:keyHintLabel="+" />
         <Key
             latin:keySpec="\#"
             latin:keyStyle="numKeyStyle" />