Nokia lumia 830 phone have good sound quality but Nokia Lumia 830 phone is not good phone for all user who does not have good knowledge in Microsoft .It is very difficult to use.Also remember this phone not a ANDROID phone it is Microsoft operating system phone.I buy this phone few month earlier but now I want to sell it.It look like not so very well as usual average compare to other low price phone.But this phone have one good feature that is battery backup is very well but otherwise it is not a good phone.It has very high price value phone compare to other band mobile. So don"t buy this phone that’s my opinion.