I really don’t know why but my dell mini 3i mobile is working to slow. I never use to connect my dell mini with external drive and I always use original antivirus so I don’t think this is happening due to virus. Whenever I try to open any menu from my mobile it takes lots of time. I had also restored it on the factory mode but even after that my mobile phone is working too slowly. So any guys out here know how to fix it?