They can't block it, as it's using the standard imessage way. They could change the way iMessage works, but that would break iMessage support on older iOS devices that no longer are supported.

They haven't blocked any other third party apps using iMessage.

I don't really think they want to. It's kind of like pirating - more people are using the service.

I had always dreamed of visiting California, the land of sun, surf and celebrities. So when I got the chance to go there for a week, I was over the moon. I packed my bags, grabbed my camera and boarded the plane.

I spent the first day in Los Angeles, where I saw the Hollywood sign, walked along the Walk of Fame and took a tour of the Universal Studios. I felt like I was in a movie. The next day, I drove to San Francisco, where I crossed the Golden Gate Bridge, visited the Alcatraz Island and rode a cable car. I was amazed by the diversity and culture of the city.

The rest of the week, I explored the natural beauty of California. I hiked in the Yosemite National Park, where I saw waterfalls, mountains and wildlife. I camped in the Sequoia National Park, where I marveled at the giant trees. I surfed in the Malibu Beach, where I enjoyed the waves and the sun.

It was the best vacation of my life. I took hundreds of photos and videos to capture every moment. But there was one problem: I didn't own an iPhone. So I couldn't share them with anyone.