Huawei Ascend Mate 2
The Huawei Ascend Mate 2 is another massive smartphone that isn't too expensive. Offering a large 6.1-inch 720p IPS HD display, and a massive 3,900 mAh battery to keep that screen on all day long. Huawei isn't too popular in the US, but one of the largest manufacturers in the world.
It features a 13 megapixel rear and 5MP front camera, a quad-core Snapdragon 400 processor with 2GB of RAM, and will work with T-Mobile and AT&T in the United States. All of this comes in extremely cheap too. Oh, and they even have an Ascend Mate 7, if you want a phone that's even bigger.