I need to replace my father's cell phone. He struggles to see things even on a 5" phone, so I really want to get him something with a big screen, like a 5.5". He is by no means a power user, so doesn't need blazing performance. However, he uses the camera a lot so I would want a card slot, and he has a couple of satellite and such programs which can be bandwidth heavy, so I guess it makes sense to look for something with LTE (at least band 4). Oh, this will be on T Mobile, btw.

So, what is essentially the cheapest 5.5" out there? I have been looking at the Oppo N3, though I am bot a huge fan of the camera design.