My Nokia Lumia 720 is in waranty period its audio jack stoped working as when I was hearing songs through earphones , I want my audio jack to be repaired in waranty because there is no physical damage in my phone . I had also went to our costoner care n service center of Nokia Lumia in rdc , ghaziabad ,up , India they told me that there is no IC repairment available . But if you are making these types of IC's so u have to replace my damaged IC .