Features

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General
In The Box Handset, Adapter, USB Cable, Sim Eject Tool, User Guide, View More... Handset, User Manual, Battery, charging cable with adapteView More... Handset, Battery, Charger, Earphone, User Manual 
Model Number M1805D1S/M1804C3CI  1821  K9 Smart Yuva 4G VoLTE 
Model Name Redmi 6A  Mega 5A  K9 Smart Yuva 4G VoLTE 
Color Gold  Champagne Gold  Black & Champagne 
Browse Type Smartphones  Smartphones  Smartphones 
SIM Type Dual Sim  Dual Sim  Dual Sim 
Hybrid Sim Slot No  No  No 
Touchscreen Yes Yes Yes
OTG Compatible Yes Yes No 
Quick Charging No  No 
Additional Content Ejection pin 
Display Features
Display Size 13.84 cm (5.45 inch)  13.89 cm (5.47 Inch)  12.7 cm (5 inch) 
Resolution 720 x 1440 Pixels  1440 x 720 pixels  854 x 480 pixels 
Resolution Type HD  HD  FWVGA 
Display Type HD 
OS & Processor Features
Operating System Android Oreo 8.1  Android Oreo 8.1  Android Nougat 7 
Processor Type Mediateck 
Processor Core Quad Core  Quad Core  Quad Core 
Primary Clock Speed 2 GHz  1.3 GHz  1.3 GHz 
Memory & Storage Features
Internal Storage 32 GB  16 GB  8 GB 
RAM 2 GB  2 GB  1 GB 
Expandable Storage 128 GB  32 GB 
Supported Memory Card Type MicroSD  MicroSD 
Memory Card Slot Type Dedicated Slot  Dedicated Slot  Dedicated Slot 
Call Log Memory Yes Yes
Phone Book Memory Yes
SMS Memory Yes
Camera Features
Primary Camera Available Yes Yes Yes
Primary Camera 13MP  8MP  5MP 
Primary Camera Features Flash 
Secondary Camera Available Yes Yes
Secondary Camera 5MP  2MP 
Flash yes  yes 
Video Recording Yes
Optical Zoom Yes
Dual Camera Lens Primary Camera 
Call Features
Phone Book No  Yes
Call Wait/Hold Yes
Conference Call Yes
Hands Free Yes
Video Call Support Yes
Call Divert Yes
Speaker Phone Yes
Call Records Yes
Logs Yes
Connectivity Features
Network Type 4G VOLTE, 3G, 2G  4G VOLTE  4G VOLTE, 3G, 2G 
Supported Networks 4G VoLTE, GSM  4G VoLTE, GSM  4G VoLTE, GSM 
Internet Connectivity 4G 
3G No  Yes
Micro USB Port Yes
Bluetooth Support Yes
Wi-Fi Yes Yes
Wi-Fi Hotspot Yes Yes
Audio Jack 3.5 mm  3.5 mm 
GPS Support Yes Yes
WAP Yes
USB Tethering Yes
Other Details
Smartphone Yes Yes Yes
Touchscreen Type HD+ 
SIM Size Nano 
Removable Battery Yes No 
SMS Yes Yes
SIM Access Dual Sim 
Sensors Ambient light sensor,, proximity sensor, accelerometer seView More...
Other Features 2 GB RAM | 32 GB ROM | Expandable Upto 128 GB | 13.84 cm View More...
Keypad No  No 
Voice Input Yes
Series Redmi 
Instant Message Yes Yes
Social Networking Phone Yes
Business Phone Yes Yes
MMS Yes Yes
Predictive Text Input Yes
Browser WAP 
Keypad Type Alphanumeric 
User Memory 24 
Multimedia Features
Audio Formats MP3 
Battery & Power Features
Battery Capacity 3000 mAh  2500 mAh  2300 mAh 
Battery Type Li-Ion  Li-Ion 
Dual Battery No  No 
Warranty
Warranty Summary 1 Year Manufacturer Warranty  12 Months Warranty  1 Year 
Warranty Service Type MANUFACTURER WARRANTY  12 Month Brand Warranty  Repair 
Covered in Warranty manufacturing defects  Manufacturer Warranty 
Not Covered in Warranty Damage 
Domestic Warranty 1 Year  1 Year