Here are the factors which you should consider while buying a mobile for gaming purpose.
Processor: The first and most important thing we should check is its chipset. A Device needs at least a quad core CPU for lag-free gaming. But on testing various chipsets. I had noticed the MediaTek chipset was very weak in playing high graphical games. It is a very good option to choose Snapdragon chipset.
RAM: Ram plays the second major part in gaming. Gaming users need high ram to handle the high-end games. buy at least 2 GB ram mobile to play games like asphalt, Nova, modern combat etc. Because we need at least 800 MB free on phone for good experience.
Display: Display resolution also effects GPU performance. Go for at least 720p Hd display mobiles for good gaming experience. Touch sensitivity is also an important factor, so better buy a mobile with at least 5 points multi-touch display.
Battery: High-end gaming can drain the battery faster. So buy a mobile which has at least 3000mah battery capacity. Rapid charging will be an added advantage for uninterrupted gaming.
Sound: To experience the real gaming feel, the sound is the major factor. Using headphones might cause a headache and many users don’t like using headphone for long period of time. So we better choose a mobile which has a very good loudspeaker. and another important factor is the position of the loudspeaker. choose a mobile which has speaker on it s front or back side. speaker on rear side might get blocked while holding the mobile in landscape mode.
Storage: High end games like nova, asphalt occupies atleast 1.5 gb storage. if you need more games to be installed in your device. buy atleast a 32 gb device. because saving games in SD card may lag your game.