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General

NameOppo R15 Dream Mirror EditionXiaomi Mi Band 4-
ModelR15 Dream Mirror EditionMi Band 4-
PriceTK. 51,990Tk 2,400-

Network

Network TypeGSM / CDMA / HSPA / LTENo-
Network 2GGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA--
Network 3GHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100--
Network 4GLTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)--
Network SpeedHSPA, LTE--
Network GPRSYes--
Network EDGEYes--

Display

Display TypeAMOLED capacitive touchscreen, 16M Colors AMOLED On-cell capacitive touchscreen, 24bit colors depth-
Display Size6.28 inches, 98.9 cm2 (~84.9% screen-to-body ratio 0.95 inches, 2.41 cm-
Display Resolution1080 x 2280 pixels 120 x 240 pixels, (~194 ppi density)-
Display MultitouchYes 120 x 240 pixels, (~194 ppi density)-
Display Density401 ppi density2.5D tempered glass, Anti-fingerprint coating Single touch button (wake up, go back)-
Display Screen ProtectionCorning Gorilla Glass 5 - ColorOS 5.0--

Camera

Primary CameraDual: 16 MP (f/1.7, 1/2.6`, 1.22 µm, PDAF) + 20 MP (f/1.7, 1/2.8`, 1 µm), , phase detection autofocus, LED FlashNo-
Secondary Camera20 MP, f/2.0, 1080p--
Camera FeaturesGeo-tagging, Touch focus, Face detection, HDR, panorama--
Video[email protected]--

Body

Body Dimensions155.3 x 75 x 7.5 mm (6.11 x 2.95 x 0.30 in) 22.1g-
Body Weight155.3 x 75 x 7.5 mm (6.11 x 2.95 x 0.30 in)--
Body BuildFront glass, ceramic body Plastic Polycarbonate-
Body ColorCeramic Black, Dream Mirror RedBlack-

Launch

Launch AnnouncementMarch, 2018 May, 2019-
Launch DateRelease April 1st, 2018Released June, 2019-

Platform

Operating SystemAndroid 8.1 Oreo Android 4.4 (KitKat)-
CPUOcta-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)--
GPUAdreno 512--
ChipsetQualcomm SDM660 Snapdragon 660--

Memory

Memory Internal128 GB 16MB-
Memory ExternalmicroSD, up to 256 GB (uses SIM 2 slot)No-
Ram6 GB 512KB-

Battery

Battery TypeNon-removable Li-Po Battery Non-removable Li-Po-
Battery Capacity3400 mAh 135 mAh battery-

Multimedia

Fm RadioNoNo-

Sound

AudioVibration, MP3, WAV Ringtones Vibration, Ringtones-
LoudspeakerYes No-
3.5mm JackYes - Active noise cancellation with dedicated mic--

Connectivity

WiFiWi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, Hotspot BT5.0 BLE-
Bluetooth5.0, A2DP, LE, EDR Yes, v5.0-
USBmicroUSB 2.0, USB On-The-GoNo-
GPSYes, with A-GPS, GLONASSNo-

Features

SensorsFingerprint/rear-mounted, accelerometer, gyro, proximity, compass 3-axis accelerometer + 3-axis gyroscope, PPG heart rate sensor, Capacitive proximity sensor-
MessagingSMS(threaded view), MMS, Email, Push EmailSMS-
BrowserHTML5 No-
JavaNoNo-

Other

Made ByChinaChina-
Other FeaturesFast battery charging: VOOC Flash Charge ,5V/4A MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Document viewer, Photo/video editorIP65 Water Resistant, Water Resistance Rating5 ATM, Charging time up to 2 hours, Wrist strap material Thermoplastic polyurethane, Wristband width18mm, Adjustable wrist strap length. Controlling App Mi Fit System requirements Android 4.4, iOS 9.0 or above Voice Recognition, Alarm, proximity sensor, pre-set watch face, customizable watch face, lock scree-