No phone or os is perfect. They all have their hiccups. When u buy fresh Andriod with Jelly bean from store - it's fantastic ! After a while when u install apps and games and use them for a while without using task manager, etc., to clean the phone periodically the lag starts and gets worse.( depends on the specs of the phone ) Iphone is great but boring but again , very, very reliable . Great apps. No comparison with anyone else. I am looking forward to their IOS 7. Apple bashing or what, they are good- period. How much so ever Samsung jumps here and there, when you want reliability it is an iphone , never a Galaxy ! The lag in Anriod phones are inevitable cause they use too many widgets which runs in the background . It is the the nature of the OS.
About Windows 8 phone. They are nice. The fastest UI I have ever seen. Reliable though not as yet as much as an IOS . ( I had a 710 and a 620 and had issues of 'hanging', though not too often like in an Andriod but nevertheless, did have ) but if Windows phone can offer better apps (like for example Line app with voice call or Facebook with Voice Messenger, etc.,) it would be better for them. The two thing ( according to me ) sucks, is their Notification ( which is not under one roof - like andriod - IOS not that good too in this department ) and irritatingly , there is NO Media Volume but only one Volume to control Media ! Now THAT was stupid ! A simple thing like that ! And a small ( but essential ) thing when you make a phone call the Recent calls is shown within the tile ( more like a Privacy issue really ) and cannot be deleted ! So, if someone takes my phone he /she can see who I have been calling unless I lock down the phone with a password which is not required all the time ! The Window Phone quirks are there. But I hope not to stay ! And I hope they improve and yes, do not stop their updates in July 2014 which I have heard and which will discourage people from buying the phone ! On the whole, Windows Phone are very good and if their apps are improved and notifications and a few quirks, I can easily say they are on the par with IOS - and Andriod the next best after them.Andriod can be customized unlike other OS and it is their strong point but also their downfall since its like a tumbling rock gathering moss. The more personalization, the more consumption of ram and so speed and smoothness. One can know this only after use and never in a store. Of course, millions of people using Anriod are happy and I would put this 'lag', more to personal taste . Thanks !