diff --git a/core/main/client/os.js b/core/main/client/os.js
index 90c39f58c..2a6e865b2 100644
--- a/core/main/client/os.js
+++ b/core/main/client/os.js
@@ -86,19 +86,19 @@ beef.os = {
 	},
 
 	isAndroid: function() {
-		return (this.ua.indexOf('Android')) ? true : false;
+		return (this.ua.match('Android')) ? true : false;
 	},
 
 	isBlackBerry: function() {
-		return (this.ua.indexOf('BlackBerry')) ? true : false;
+		return (this.ua.match('BlackBerry')) ? true : false;
 	},
 
 	isQNX: function() {
-		return (this.ua.indexOf('QNX')) ? true : false;
+		return (this.ua.match('QNX')) ? true : false;
 	},
 	
 	isBeOS: function() {
-		return (this.ua.indexOf('BeOS')) ? true : false;
+		return (this.ua.match('BeOS')) ? true : false;
 	},
 	
 	getName: function() {