2012 Mobile Devices having Quad Cores

How are these processors being promoted to Smartphone? Who are those Smartphone Companies having Quad Core on their mobile device?

How are these processors being promoted to Smartphone? Who are those Smartphone Companies having Quad Core on their mobile device?
Currently, most of the new smart phones on the market have dual-core processors on them. Since it is a dual-core the time it takes to process a certain task on a smartphone doesn't take a long time, but since technology just gets better and better; there is a need to have an upgrade. Having a quad-core processor on a smart phone would be an advantage especially for consumers who need to do multiple tasks on their smartphones at the same time. A smart phone with this processor is expected to be five time faster than a smart phone with a dual-core processor.
Here are several of the Smartphone models running on Quad-Core processors. The Gionee Elife E3 is running on Android 4.2.1 Jelly Bean powered by 1.2 GHz Quad-Core Cortex A7 processor and PowerVT SGX GPU. It has a multitouch color IPS display with 720 x 1280 pixels screen resolution. It supports HTML for internet access and Java.
The WickedLeak Wammy Passion Z runs on Android 4.2.1 Jelly Bean powered by 1.5 GHz Quad-Core MediaTek processor and PowerVR SGX544MP GPU. It measures 141 x 68.7 x 8.9 millimeters and weighs about 150 grams. It has a standby time of up to 48 hours on 2G and talk time is up to 10 hours on 2G.
It has a full HD IPS capacitive touchscreen display with 1920 x 1080 pixels screen resolution. It features multitouch and has Scratch resistant Dragon Trail Glass screen protection.
The Celkon A119Q Signature HD runs on Android 4.2.1 Jelly Bean powered by Quad-core 1.2 GHz Cortex-A7 processor and MTK 6589 chipset. It was unveiled and also released just this year, April 2013. It measures 148 x 74.5 x 9.3 millimeters and weighs 177 grams or 6.24 ounces. It has a capacitive touchscreen display with 16M colors and 720 x 1280 pixels screen resolution.
It has a standby time of up to 140 hours and talk time of up to 6 hours. The primary camera supports 12 megapixels with 4000 x 3000 pixels resolution, autofocus, LED flash, and supports video recording. The secondary camera supports 3 megapixels.
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