I purchased I Kall N4for a try.At first I thought it is a great tab available in the market comparing to the price.But I was wrong after 3 months of use.Coming to the points. - Network module of this tablet is very poor.because of this tablet’s calling system does not works properly.it shows emergency calls while other mobiles shows network tower.It means it hasn’t a powerful network module. - Customer service is very poor and slow as well.Firstly you won’t able to find I kall service centers in every city.you can rarely find I kall service center.in West Bengal only one city Kolkata has I kall service center.though they most of the times tell that they dont have tablet parts , so they send your tab in bangalore and it takes 25-30 days to repair! very disappointing. Also its battery doesn’t gives a backup of 6 hours in mixed use.it has a heating problem during playing online games and charging time.my tab started hanging after 2 months of use! very bad. - I kall charges near about Rs 4500 in offline market. I think if you buy this tablet, according to performance, your money will be waste. Overall this tablet is not good at all.xolo play tigra note is much better than this tab.Thnks.