BlackBerry simply need to step it up and improve the UI. I'm loving the flat outlook but as much as I love bb (playbook was my first purchase then z10) I used a Sony z1 yesterday and was so impressed by the graphics and how snappy it was. If I do end up with an android next definitely won't be Samsung. Probably LG or Sony or nexus or next touchscreen BlackBerry releases.
Basically my point is, I also think they need to standardize app shape at least. Some are rounded some are sharp edged and others rounded square. Also better colors.
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