diff --git a/channels/static/channels/js/websocketbridge.js b/channels/static/channels/js/websocketbridge.js
index d7b2845..e5650e4 100644
--- a/channels/static/channels/js/websocketbridge.js
+++ b/channels/static/channels/js/websocketbridge.js
@@ -283,7 +283,10 @@ var WebSocketBridge = function () {
           _url = url;
         }
       }
-      this.socket = new _reconnectingWebsocket2.default(_url, protocols, options);
+      // Some mobile devices (eg: HTC M8, SAMSUNG Galaxy S8) will get error code
+      // [1006] during handshake if `protocols` is `undefined`.
+      var _protocols = protocols === undefined ? '' : protocols;
+      this.socket = new _reconnectingWebsocket2.default(_url, _protocols, options);
     }
 
     /**
diff --git a/js_client/lib/index.js b/js_client/lib/index.js
index 53ca4f0..0e69313 100644
--- a/js_client/lib/index.js
+++ b/js_client/lib/index.js
@@ -72,7 +72,8 @@ var WebSocketBridge = function () {
           _url = url;
         }
       }
-      this.socket = new _reconnectingWebsocket2.default(_url, protocols, options);
+      var _protocols = protocols === undefined ? '' : protocols;
+      this.socket = new _reconnectingWebsocket2.default(_url, _protocols, options);
     }
 
     /**
diff --git a/js_client/src/index.js b/js_client/src/index.js
index b2ebd81..ae0fd48 100644
--- a/js_client/src/index.js
+++ b/js_client/src/index.js
@@ -50,7 +50,10 @@ export class WebSocketBridge {
         _url = url;
       }
     }
-    this.socket = new ReconnectingWebSocket(_url, protocols, options);
+    // Some mobile devices (eg: HTC M8, SAMSUNG Galaxy S8) will get error code
+    // [1006] during handshake if `protocols` is `undefined`.
+    const _protocols = protocols === undefined ? '' : protocols;
+    this.socket = new ReconnectingWebSocket(_url, _protocols, options);
   }
 
   /**