You might also consider some the so called mid-tier smartphone offerings. A number of them offer 90+% of what the iPhone/Samsung originally mentioned offer for less than half the price. My Asus ZenFone 2 is not perfect, but provides dual SIM, microsdxc slot, big display, removable battery (on some models) for a modest price.
iOS is very good and nothing to criticize about it, but I do prefer the added flexibility of Android even if it is still a bit less polished.
iOS is very good and nothing to criticize about it, but I do prefer the added flexibility of Android even if it is still a bit less polished.