I am planning to buy a mobile around rs.10000.which mobile is better?

Among these two, you must go for Nokia lumia 520. If you wanna go through other options in android have a look at following mobiles. Xolo A700 > 8000 Samsung galaxy music duos > 7200 Lava iris N400 > 6100 Spice stellar nhance Mi-435 > 7500 Celkon A97i > 7300 Celkon A200 > 8000

nokia lumia 520 galaxy ace is a 3 year old phone never buy it .

lumia 520 has windows 8, dt means equal apps lyk android, so dnt wry mocu, even the shape and specs are way betr in 520 as compared to galaxy ace duos. But lacks front camera 4 video calling. so decide on ur own.. but y nt goping 4 xperia j, it vl cost around 12k or lil less dn dt. it is dust proof, water proof.. and is upgradable to jellybean. So try goin 4 xperia j i woud suggest.

you can go for Nokia Lumia 520 because its a windows 8 phone with dual core processor and 512MB ram and other good features which is not in galaxy ace.

You already have options, go for Nokia. But why not try Sony xperia, can't remember the series but it's at that price range.

I think lumia 520 is better Here are the reviews Samsung ace http://m.gsmarena.com/samsung_galaxy_ace_s5830-3724.php Lumia 520 http://m.gsmarena.com/nokia_lumia_520-5322.php Hope this helps

galaxyyyy :) i use it .don't buy Nokia

Nokia lumia 520 is way better, I own both of them

I would say galaxy ace is a better choice. Buying a windows phone as opposed to an android one is not a smart choice.