crwdns2934241:0crwdne2934241:0 Wade

crwdns2934249:0crwdne2934249:0:

Theoretically, yes.  Try the link on this page and see if it shows how to change the speaker. [https://www.ifixit.com/Answers/View/176889/How+can+I+open+lumia+720]

Also sounds like a hardware issue. Have you contacted Nokia or your carrier for a replacement?

crwdns2915684:0crwdne2915684:0:

open