The specification I want.
SoC: MediaTek MT6752
RAM: 2GB or higher
ROM: 16GB or higher
Display Technology: IPS
Display Size: 5 inch ~ 5.5 inch
Display Resolution: 720p (HD)
Radio Bands: Supports both at&t and T-Mobile GSM, HSDPA+, and LTE bands
Battery Capacity: 2500 mAh or higher
I already own two MT6752 based phones. Their performance is satisfactory while their prices are very reasonable. The only drawback is both phones do not support some radio bands, especially LTE, at&t and T-Mobile use in the US.