Samsung Galaxy S4

I got S4 3 months ago. Till now I have called customer care f 3 times regarding performance issues, as it hangs.

Pros -

1. Looks slim and weight less

2. Customer care takes forever by Samsung Tutor to resolve our phone issues.

Cons -

1. Battery s when Mobile data is on.

2. Multi window cannot add any applications.

3. Camera gets hanged some times.

4. Even after getting 42k worth mobile getting hanged some time/loading application late is disappointing.