It is not working properly, hanging problem is there, pdf file not opening in whatsapp clone.I am unable to read any pdf file. Please resolve the problem as soon as possible. Problem is still same. During opening of pdf file in whatsapp,it is not opening, message displays" mo chat is not responding, do you want to close it." Requested, please resolve the issue. Problem is still unresolved. PDF file is not opening. Please resolve if possible. As you told for downloading us "whats chat," I downloaded but the problem is same.PDF files are not opening through these apps. Please tell as whether the changes may be done in your app in future or we should change another app .Do not tell us wrong information. I hope you have no solution of the captioned problem. Thanks. Superb!