My current data plan is enough for me, I use a lot of wifi so am good but I can see why some people are excited to have this back. Still not mega cheap but still, a step in the right direction for a lot of people.
VPN's aren't all created equal so it really depends what you are looking for. As the other poster mentioned, free isn't always the way to go. You might get stung later on to pay and the ads are super annoying. Do some research, there's a lot of Android specific info out on the web...
Me too. I bought a second hand S6 to see if I could get to grips with it after converting from iPhone. I'm loving it and definitely have my eyes on something shiny and new.
I'm a convert from Apple as well. I just got fed up with their lack of flexibility and big price tags. So far am loving my Android...although that will probably only last until I get stuck on something!
I had a similar problem with mobile banking not working. I assumed it was to do with my IP address or ISP and the app went into security overdrive and blocked it. I can't imagine that would be the case with social media sites though.
Sorry I can't be more help, I feel your pain though.