This is a replacement for Sony Xperia Sola, When you turn up or turn down volume button,but it is not reaction,and your volume button in ok,that means maybe your volume flex cable is broken,you need it to replace.
Parts offer a 90-Day warranty. The warranty period covers any defects in the material or the workmanship of the product. Warranty does not cover any damage done while using the product. Any product returned within warranty period will be eligible for a refund or a replacement.