check pros and cons of set u r gona buy on YouTube.

yes you can check up warranty by going to setting, about, there you see first call from your mobile this is your time when your warranty starts

I have talk to samsung support but they said whatsapp app is having issues in their update, there is nothing to do with mobile. Then I have sent mail to whatsapp they are giving lame excuses that ur mic is using some other application. But still this...

I am having same problem and u have tried hard reset too