diff --git a/app/src/main/res/raw/dks_1802.json b/app/src/main/res/raw/dks_1802.json
index ded3e0b..306f6fc 100644
--- a/app/src/main/res/raw/dks_1802.json
+++ b/app/src/main/res/raw/dks_1802.json
@@ -217,9 +217,9 @@
       "title": "Set Area Code",
       "fields": [
         {
-          "hint": "Area Code Ref Number (00..15)",
+          "hint": "Area Code Ref Number (01..15)",
           "size": 2,
-          "min": 0,
+          "min": 1,
           "max": 15
         },
         {
@@ -510,9 +510,9 @@
           "size": 3
         },
         {
-          "hint": "Area Code (00..15)",
+          "hint": "Area Code Ref Number (01..15)",
           "size": 2,
-          "min": 0,
+          "min": 1,
           "max": 15
         },
         {
diff --git a/app/src/main/res/raw/dks_1802_epd.json b/app/src/main/res/raw/dks_1802_epd.json
index 3f56968..f9152d3 100644
--- a/app/src/main/res/raw/dks_1802_epd.json
+++ b/app/src/main/res/raw/dks_1802_epd.json
@@ -217,9 +217,9 @@
       "title": "Set Area Code",
       "fields": [
         {
-          "hint": "Area Code Ref Number (00..15)",
+          "hint": "Area Code Ref Number (01..15)",
           "size": 2,
-          "min": 0,
+          "min": 1,
           "max": 15
         },
         {
@@ -510,9 +510,9 @@
           "size": 3
         },
         {
-          "hint": "Area Code (00..15)",
+          "hint": "Area Code Ref Number (01..15)",
           "size": 2,
-          "min": 0,
+          "min": 1,
           "max": 15
         },
         {
diff --git a/app/src/main/res/raw/dks_1819.json b/app/src/main/res/raw/dks_1819.json
index ee6580c..2851823 100644
--- a/app/src/main/res/raw/dks_1819.json
+++ b/app/src/main/res/raw/dks_1819.json
@@ -35,9 +35,9 @@
       "title": "Set Area Code",
       "fields": [
         {
-          "hint": "Area Code Ref Number",
+          "hint": "Area Code Ref Number (01..15)",
           "size": 2,
-          "min": 0,
+          "min": 1,
           "max": 15
         },
         {
@@ -52,9 +52,9 @@
       "title": "Add Phone Number w/ Area Code",
       "fields": [
         {
-          "hint": "Area Code",
+          "hint": "Area Code Ref Number (01..15)",
           "size": 2,
-          "min": 0,
+          "min": 1,
           "max": 15
         },
         {