You ridiculous fool. The article on the ASOP browser flaw is dated 17th September 2014, which is less than two months ago. What's more, I checked a colleague's Galaxy S4 today and have left him trying to figure out how to change his default browser. This phone is less than a year old and hasn't been offered the Kit Kat update which would solve the flaw.
Before you tell me what you're 'pretty sure of' check your facts, because 'pretty sure of' stands for nothing but ignorance and if that's the best you can do, then pass me on to someone who knows what they're talking about.
Microsoft make it very clear that user files are deleted upon reset. Not just the directory tree, but the files themselves. I stated it as a fact, because it is a fact and I checked it out months ago.
No, I could not benefit from watching that video. That's because I have been using and building computers for very nearly thirty years. There's a very good chance I've forgotten more about computers than you'll ever know. I remember when hard drives were called Winchesters and floppy discs had cardboard sleeves.
If Android were secure, there would be no need for Knox and since Samsung is the largest single maker of Android devices by far, your claim that is isn't representative is astounding in its dishonesty.
Now if you're sure Windows Phone is as insecure as Android, why don't you stop wasting my time and post a link to an article about it? You have the might of Google to help you find it and copious sources such as engadget, arstechnika and others who are sure to have covered it. It's easy and here's Android security flaw
number 5 to prove it. And I don' even use Google.
If you can't, then face the facts: you've bought into a system which can't keep your information safe and isn't fit to run a vacuum cleaner.