Discussions are now open! Start your own threads and share your thoughts with the community. Home Karbonn Phones You are here Updated : Mar 27, 2015, 4:07 AM Karbonn A21 Full Specifications Android 4.0 4.5-inch · 800x480px Single camera 1800 mAh 4GB Be the first to review this phone I want it 0 users I have it 0 users I had it 0 users Popular Comparisons The Karbonn A21 is most commonly compared with these phones: Karbonn A21 vs Samsung Galaxy A03 Karbonn A21 vs Samsung Galaxy A14 5G Design Colors White Display Size 4.5-inch Resolution 800x480px, 207 PPI Hardware Processor Dual-core1200 MHz Internal storage 4GB Storage expansion microSDHC up to 32 GB OS Android (4.0) Battery Capacity 1800 mAh Camera Rear Single camera Main camera 5 MP (Autofocus) Flash LED Video recording Yes Front 1.3 MP Connectivity & Features Bluetooth Yes WLAN 802.11 b,g,n USB microUSB Location GPS, A-GPS Multimedia Broadcast Mobile TV Yes Speakers Loudspeaker Features Album art cover, Background playback Cellular 3G Bands 1(2100) Data Speed HSDPA 7.2 Mbit/s, UMTS Dual SIM Yes Phone Features Notifications Music ringtones, Vibration Other features Voice dialing, Voice commands, Voice recording Despite our efforts to provide full and correct Karbonn A21 specifications, there is always a possibility of admitting a mistake. If you see any wrong or incomplete data, please LET US KNOW. If you are interested in using our specs commercially, check out our Phone specs database licensing page. Latest News Major iPhone 2025 battery capacity leak will have you drooling over one model Apple’s plan for an iPhone and MacBook crossover is pure genius Official Galaxy Z Fold 7 cases suggest Samsung is extra confident this year Leaked renders of the official Galaxy Z Flip 7 cases give us an early look at Samsung’s accessories New T-Mobile offer will tie customers not currently financing devices to the company iOS 26 has a secret feature that might freeze your FaceTime video and audio Popular stories Samsung just sabotaged the Galaxy Z Fold 7. What now? Debate about whether T-Mobile or Verizon is the best may have finally been settled New T-Mobile offer will tie customers not currently financing devices to the company Samsung's groundbreaking tri-fold phone will cost a fortune and pack 'top-of-the-line' specs Galaxy Z Fold 7 battery less than 4,400 mAh, IP rating also disappoints Samsung is having major profitability issues due (among others) to poor Galaxy S25 series sales