I purchased the one plus before two months and iam using that only it packs a 5.5 inch full hd resolution screen.
Snapdragon 810 chipset, octacore processor, 4 giga byte of ram , 64 gigabyte of I 5ernal storage, 3.5 mm audio jack, its a dual sim devive and it also supports 4k streaming, it is a lte enabled device , really guyz its not a flagship killer bit it is worth the money u buy, go for it guyz its your op2 now