With each passing days, technology gets cheaper, atleast that holds water when it comes to the world of smartphones and tablets. Few years back, quad core devices were equated with high end devices only which were mostly out of reach of the average buyers.
Now how much the scenario has changed is evident from the fact that now a quad core smartphone can be purchased for as low as Rs 2,999. Here we have listed five phones with quad core Processor and all these are available for less than Rs 4,000.
The Celkon Win 400 has a 4 inch TFT display with a Resolution of 480 x 800 pixels. It comes with Windows 8.1, and has a quad-core 1.3 GHz processor, with 512 MB of RAM. The Internal Memory of the Celkon Win 400 stands at 4 GB, to which another 32 GB can be added. 
The primary camera of the Celkon Win 400 is a 5 megapixel unit with auto-focus, flash, and video recording. In the front of the Celkon Win 400 there is a 1.3 megapixel camera. This Dual-SIM phone has 3G, WiFi, Bluetooth, GPS and a 1500 mAh battery that claims to offer up to 5 hours of Talk time or 200 hours of standby.
The Karbonn S15 has a 4 inch display with a resolution of 480 x 800 pixels. This Android KitKat based smartphone has a quad-core 1.2 GHz processor and 512 MB RAM. The S15 has 4 GB of internal memory, to which another 32 GB can be added. 
The Karbonn S15 has a 3.2 megapixel camera and a flash light in the rear panel while a VGA camera is in its front. The Karbonn S15 is a dual-SIM phone with 3G, WiFi, GPS, and Bluetooth. For power needs, it has a 1500 mAh battery.
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Spice Stellar Mi 445 – Rs 3,750
The Spice Stellar Mi 445 has a 4 inch TFT display with a resolution of 480 x 800 pixels. Running on Android Jelly Bean, the Spice Stellar Mi 445 has a quad-core 1.2 GHZ processor, with 512 MB of RAM. The handset offers 4 GB of internal memory and a 32 GB micro SD card slot. 
The Stellar Mi 445 offers a 3..2 megapixel rear camera and a 1.3 megapixel front camera. For connectivity, the dual-SIM Spice Stellar Mi 445 has 3G, Bluetooth, WiFi, GPS. Power is supplied by a 1500 mAh battery.
Karbonn Titanium S99 – Rs 3,735
The Karbonn Titanium S99 has a 4 inch display with a resolution of 480 x 800 pixels. Running on Android KitKat, the Karbonn Titanium S99 has a quad-core 1.3 GHZ processor, with 512 MB of RAM. Besides, it has 4 GB internal memory, 32 GB micro SD card slot, 5 megapixel rear camera, rear flash light, 0.3 megapixel front camera, dual-SIM, 3G, Bluetooth, WiFi, GPS and a 1400 mAh battery.
Fly Snap – Rs 2,999
The cheapest phone in this line up is the Fly Snap that has a 4 inch IPS display with a resolution of 480 x 800 pixels. The Fly Snap runs on Android KitKat, and has a quad-core 1.3 GHz processing unit with 512 MB of RAM. The internal storage of the Fly Snap is 4 GB, to which another 16 GB can be added via a microSD card.
The phone offers a 5 megapixel primary camera and a flash light. In the front of Snap, there is a 2 megapixel selfie taker. The dual-SIM Fly Snap is equipped with 3G, WiFi, GPS, Bluetooth, and radio. The Fly Snap has a 1500 mAh battery.