The first thing that I can say about mobile strategy for large banks is that I can not cover it sufficiently in a blog post. Like business strategy, we will need to peel it back layer-by-layer.
In any kind of IT strategy investigation I recommend step 1 be a diligent survey of reading material and this usually involves lots of books, articles and analyst reports. So let’s get started with Gartner Magic Quadrant for Mobile Application Development Platforms, 7 August 2013 ID:G00248487. I believe that you can access this one for free!