Not that they’re slouches otherwise. All of them have sharper displays (720p on the A3, 1080p on the A5 and A7), faster processors (1.5GHz quad-core and 1.6GHz octa-core) and higher-capacity batteries. You’ll also find optical image stabilization on the 13-megapixel cameras for the two higher-end models, although little has changed for the 5-megapixel front shooters. And yes, despite the trend among higher-end Samsung handsets, they still have microSD card slots to expand their built-in 16GB of storage.
China gets first crack at the new Galaxy A series in mid-December, and you’ll see the line spread to other countries after that. That’s unfortunate if you want to pick up a Galaxy A before the year is out, but it makes sense given Samsung’s recent troubles. On top of its lackluster high-end sales, it’s being squeezed at the low end by Chinese rivals like Huawei and Xiaomi, which offer feature-packed phones for very little cash. Samsung needs these new budget models if it wants to bounce back in the country.
Source Article from http://www.engadget.com/2015/12/02/samsung-galaxy-a-2016/