FACEBOOK MESSENGER-A good messenger app if you use facebook .as the name suggest its a instant messenger service from facebook.its light compact and good messenger service but if you use facebook on your phone these guys just force you to down load facebook messenger which is quite annoying .it works well with 2G, 3G, AND 4G.GOOD FUN way to be in touch with your buddy’s.but there are better options available so if you use facebook on phone then you can have it as your messenger service.FINAL VERDICT-OK MESSENGER SERVICE NOT THAT GREAT .