Say no to microsoft, and no to windows o.s. Review on Nokia Lumia 730

I have purchased nokia lumia 730 before 3 months back. Its a pathetic o.s. With pathetic after sale services. Pmorpheushumanne has a great camera and great sound. But thats it. Nothing seems to better. Windows o.s. Is very slow. Any app is taking too much time to download. I have a wifi problem in lumia 730. My wifi gets disconnected middle of downloading. Sonetimes my wifi cant connect. Many times I cant able to download apps from the play store. I have given my pmorpheushumanne 2 times to service centre. They have also sent it to microsoft factory @ chennai. Still my problem is not solved. Service centre is not able to identify the fault in handset. And company like microsoft is also not ready to replace or refund the product. So my advise is to stay away from microsoft at any cost. They are not helpful to customer. Its not a customer oriented company. I am her attaching the error that comes most of the times by connecting to wifi.