Oppo A57 has Android 6.0 ( Marshmallow ) , It offers an internal memory of 32 GB with 3 GB RAM , It presents a screen of HD resolution , It comes with battery capacity of 2900 mAh .

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Oppo A57 specifications

General

6053 Announce date : November , 2016
6053 Release date : December , 2016
6053 Height × Width : 149.1 mm x 72.9 mm ( 5.87 x 2.87 in )
6053 Thickness : 7.7 mm ( 0.30 in ) [ The average in this size : 7.8 mm ]
6053 Weight : 147 g ( 5.19 oz ) [ The average in this size : 148 g ]
6053 SIM : Dual SIM ( Nano-SIM , dual stand-by )
6053 Colours : Gold , Rose Gold

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Display

6053 Display type : IPS LCD capacitive touchscreen ,16M colors
6053 Screen size : 5.2 inches ( ~68.6% screen-to-body ratio ) [ The average
6053 in market : 5.2 inches ]
6053 Resolution : 720 x 1280 pixels [ HD resolution ]
6053 Pixel density : (~282 ppi pixel density) [ The average in this size : 390 ppi
6053 pixel density ]
6053 Multitouch feature :   yes
6053 Color OS 3.0 :   yes

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Camera & Video

6053 Rear camera : 13 MP , f/2.2 , phase detection autofocus , LED flash
6053 [ The average in this size : 13 MP ]
6053 Camera features : Geo-tagging , touch focus , face detection , HDR ,
6053 panorama
6053 Video : 1080p@30fps [ Full HD video ]
6053 Front camera : 16 MP , f/2.0 , 1.12 µm pixel size , 1080p [ The average
6053 in this size : 8 MP ]

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Memory

6053 Expandable memory :1Card slot1microSD ,1up to 256 GB ( uses SIM 2
6053 slot )
6053 Internal Memory : 32 GB [ The average in this size : 41 GB ]
6053 RAM : 3 GB RAM [ The average in this size : 3 GB RAM ]

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Battery

6053 Battery type : Non-removable Li-Ion
6053 Battery capacity : 2900 mAh [ The average in this size : 2950 mAh ]

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Platform

6053 Operating System : Android 6.0 ( Marshmallow )
6053 Chipset : Qualcomm MSM8940 Snapdragon 435
6053 Processor : Octa-core 1.4 GHz Cortex-A53
6053 Graphics : Adreno 505

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Network

6053 2G bands : GSM 850 /900 /1800 /1900 – SIM 1 & SIM 2 & CDMA 800
6053 3G bands : HSDPA 850 / 900 / 1900 / 2100 & TD-SCDMA
6053 4G bands : LTE & LTE – India ( Band 40 )
6053 Speed : HSPA , LTE
6053 GPRS :   yes
6053 EDGE :   yes

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Sound

6053 Alert types : Vibration , MP3 , WAV ringtones
6053 Loudspeaker :   yes
6053 3.5 mm jack :   yes

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CONNECTIVITY

6053 WLAN : Wi-Fi 802.11 a/b/g/n , hotspot
6053 Bluetooth : 4.1 , A2DP
6053 GPS :   yes , with A-GPS
6053 USB : MicroUSB 2.0 , USB Host
6053 Radio : FM radio

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Features

6053 Sensors : Fingerprint ( front-mounted ) , Accelerometer , Compass ,
6053 Proximity , Gyro , Ambient light sensor
6053 Messaging : SMS ( threaded view ) , MMS , Email , Push Mail
6053 Browser HTML5 :   yes
6053 MP3/WAV/eAAC+ player :   yes
6053 MP4/H.264/FLAC player :   yes
6053 Document viewer :   yes
6053 Photo/video editor :   yes

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Oppo A57 disadvantages

6053 Java :   No
6053 NFC :   No
6053 Infrared port :   No
6053 Removable battery :   No
6053 Protection for the screen :   No
6053 Water & Dust resistant :   No
6053 Barometer sensor :   No
6053 Temperature sensor :   No
6053 Active noise cancellation with dedicated mic :   No
6053 Wi-Fi Direct :   No
6053 Fast battery charging :   No

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6053 *** [ The averages are calculated for all phones released in 2016 & 2017
6053 ( for each size alone ) ]