I have purchased one IKALL K21 SMART WATCH from home shop 18from TV. It was life's mistake. I never thought it was a disaster for me first of all when I opened the box watch was OK to see but it doesn't switch on I charged it but no response and when I opened back cover battery was swelling like balloon. I called customer they told me to send it by post.i was surprised why they can't collect it. And I have to pay postal charge hmmmmm. Further you can understand my situation currently watch is with me like when I opened it first time.