None, literally. Even though I disagreed with them not paying a single dime in taxes, I was a Verizon customer for years. But once I found out that Verizon was tracking the meta data of my calls for the government, and Google/Android was tracking other phone activity, I suddenly felt that the phone was something I could do without. I sold it and have never replaced it, nor do I intend to. Maybe that is too extreme for most people. I just have a bad taste in my mouth for government spooks. In 2001 the FBI tried to intimidate me by telling me my calls were recorded simply because some of my clients were bookmakers in Costa Rica. That ticked me off. Fast forward a decade and Snowden showed me the problem was worse than I thought.
I'm using Samsung Galaxy Note 2 and I think it is perfect for anything. No need to upgrade to Note 3 or Galaxy S5. My Note 2 can playing highest GUI game and other stuff easily and pretty fast response. I used to have iPhone 5S, for my personal life, not work well for me. I love android because it's very flexible and compatible with many devices, for example, connected to PC or Mac for transferring (upload and download) any file from/to my Note 2 phone. This is just my personal idea.
I am rocking a HTC One at the moment and I am absolutely in love with it. I had a HTC Windows 7 phone before that and when I get my upgrade at the end of the year I'm going to look at the new HTC One x as I wan to stay with the same style of phone as I have right now.
iPhone 5. I know a lot of people will say "Why?" because it's so much faster than Samsung or any other phones out there. Waiting on iPhone 6, got to love all the rumors of the design.
Now onwards Windows Phones. Lumia 930 and Lumia 730 Love the wide angle camera , video quality , Skype support , Office Hub and many more.................