I got Samsung Duos S7562 after reading a lot of reviews and seeing it personally with one of my friend. I liked it and got it, it initally was a great phone.
But when I started using it over wifi and net it got so damn slow that even when I click or slide it take 30 sec to 1 min to get to other screen. moreover to add to my miseries it has a very low internal space of 2 gb where more than 1.5 gb are applications and it hangs now and then a lot.
What happens when wifi is on is it tries to update all apps for example data on whatsapp and at the same time if someone wants to make a call or browse something then can see hell. you would sometimes gets so frustrated that you would like to keep it aside and do nothing. thanks to my external memory that I keep moving all of those from my phone memory to external memory and their`s a relief to work little faster. not sure why they have put such small memory in this smart phone generation times. with so many application and personal stuffs I would suggest everyone to but with huge internal memory and also add external to back it up. clean things regurarly.