diff --git a/data_embed/index.html b/data_embed/index.html
index 16ef656..faf8649 100644
--- a/data_embed/index.html
+++ b/data_embed/index.html
@@ -581,7 +581,7 @@
                                                 WIDE1 (fill-in) Digi
                                             </option>
                                             <option value="3">
-                                                WIDE1 and/or WIDE2 (fill-in) Digi
+                                                WIDE2 (+WIDE1) (fill-in) Digi
                                             </option>
                                         </select>
                                     </div>
diff --git a/src/utils.cpp b/src/utils.cpp
index c653e48..6834c65 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -348,17 +348,21 @@ namespace Utils {
             cleanCallsign = " " + cleanCallsign;    // A0AA --> _A0AA
         }
 
-        if (!isDigit(cleanCallsign[2]) || !isAlpha(cleanCallsign[3])) return false; // __0A must be validated
+        if (!isDigit(cleanCallsign[2]) || !isAlpha(cleanCallsign[3])) {     // __0A__ must be validated
+            if (cleanCallsign[0] != 'R' && !isDigit(cleanCallsign[1]) && !isAlpha(cleanCallsign[2])) return false;    // to accepto R0A___
+        }
 
         bool isValid = false;
         if ((isAlphaNumeric(cleanCallsign[0]) || cleanCallsign[0] == ' ') && isAlpha(cleanCallsign[1])) {
             isValid = true;     //  AA0A (+A+A) + _A0AA (+A) + 0A0A (+A+A)
         } else if (isAlpha(cleanCallsign[0]) && isDigit(cleanCallsign[1])) {
             isValid = true;     //  A00A (+A+A)
+        } else if (cleanCallsign[0] == 'R' && cleanCallsign.length() == 6 && isDigit(cleanCallsign[1]) && isAlpha(cleanCallsign[2]) && isAlpha(cleanCallsign[3]) && isAlpha(cleanCallsign[4])) {
+            isValid = true;     //  R0AA (+A+A)
         }
         if (!isValid) return false;   // also 00__ avoided
 
-        if (cleanCallsign.length() > 4) {
+        if (cleanCallsign.length() > 4) {   // to validate ____AA
             for (int i = 5; i <= cleanCallsign.length(); i++) {
                 if (!isAlpha(cleanCallsign[i - 1])) return false;
             }