How to test my Nokia Lumia 1520 for full functionality?

[WPCentral Question]

I am considering to buy a Nokia Lumia 1520 (open box item) through ebay. There is a 30 day return policy offered by seller. Once received, I would like to test the phone for full functionality. Is there any inbuilt feature in the phone that allows me to do so? or an app may be ? What are my choices here?

Thanks in advance !

 

[Pacus1x]

You can try the WinPhone Info Free app to get all the info you want. There is another good app Hardware Tests.