diff --git a/src/Plugin.InAppBilling.Abstractions/InAppBillingExceptions.cs b/src/Plugin.InAppBilling.Abstractions/InAppBillingExceptions.cs
index 34ec9da..2dd73f5 100644
--- a/src/Plugin.InAppBilling.Abstractions/InAppBillingExceptions.cs
+++ b/src/Plugin.InAppBilling.Abstractions/InAppBillingExceptions.cs
@@ -11,10 +11,10 @@ namespace Plugin.InAppBilling.Abstractions
     /// </summary>
     public enum PurchaseError
     {
-        /// <summary>
-        /// Billing system unavailable
-        /// </summary>
-        BillingUnavailable,
+		/// <summary>
+		/// Billing API version is not supported for the type requested (Android), client error (iOS)
+		/// </summary>
+		BillingUnavailable,
         /// <summary>
         /// Developer issue
         /// </summary>
diff --git a/src/Plugin.InAppBilling.Android/InAppBillingImplementation.cs b/src/Plugin.InAppBilling.Android/InAppBillingImplementation.cs
index b3c956e..b98902c 100644
--- a/src/Plugin.InAppBilling.Android/InAppBillingImplementation.cs
+++ b/src/Plugin.InAppBilling.Android/InAppBillingImplementation.cs
@@ -81,7 +81,7 @@ public async override Task<IEnumerable<InAppBillingProduct>> GetProductInfoAsync
         {
             if (serviceConnection?.Service == null)
             {
-                throw new InAppBillingPurchaseException(PurchaseError.BillingUnavailable, "You are not connected to the Google Play App store.");
+                throw new InAppBillingPurchaseException(PurchaseError.ServiceUnavailable, "You are not connected to the Google Play App store.");
             }
 
             IEnumerable<Product> products = null;
@@ -151,7 +151,7 @@ public async override Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(
         {
             if (serviceConnection?.Service == null)
             {
-                throw new InAppBillingPurchaseException(PurchaseError.BillingUnavailable, "You are not connected to the Google Play App store.");
+                throw new InAppBillingPurchaseException(PurchaseError.ServiceUnavailable, "You are not connected to the Google Play App store.");
             }
 
             List<Purchase> purchases = null;
@@ -252,7 +252,7 @@ public async override Task<InAppBillingPurchase> PurchaseAsync(string productId,
 
             if (serviceConnection?.Service == null)
             {
-                throw new InAppBillingPurchaseException(PurchaseError.BillingUnavailable, "You are not connected to the Google Play App store.");
+                throw new InAppBillingPurchaseException(PurchaseError.ServiceUnavailable, "You are not connected to the Google Play App store.");
             }
 
             Purchase purchase = null;
@@ -403,7 +403,7 @@ public override Task<InAppBillingPurchase> ConsumePurchaseAsync(string productId
         {
             if (serviceConnection?.Service == null)
             {
-                throw new InAppBillingPurchaseException(PurchaseError.BillingUnavailable, "You are not connected to the Google Play App store.");
+                throw new InAppBillingPurchaseException(PurchaseError.ServiceUnavailable, "You are not connected to the Google Play App store.");
             }
 
             var response = serviceConnection.Service.ConsumePurchase(3, Context.PackageName, purchaseToken);
@@ -466,7 +466,7 @@ bool ParseConsumeResult(int response)
         public async override Task<InAppBillingPurchase> ConsumePurchaseAsync(string productId, ItemType itemType, string payload, IInAppBillingVerifyPurchase verifyPurchase)
         {
             if (serviceConnection?.Service == null)
-                throw new InAppBillingPurchaseException(PurchaseError.BillingUnavailable, "You are not connected to the Google Play App store.");
+                throw new InAppBillingPurchaseException(PurchaseError.ServiceUnavailable, "You are not connected to the Google Play App store.");
 
 
             if (payload == null)