Download latest KitKat 4.4.2 stock firmware for Elephone P3000s smartphone from here or here. Download another Elephone firmware from here.
Archive： Elephone P3000S MTK6592+6290 177499 20141220
Image: 20141220_c201v92ds_jbaol1_3m_ouya_b1_3_7_20
Model: Elephone P3000s smartphone
Image file size: 438 MB
Platform: Mediatek MTK6592
Project: c201v92ds_jbaol1_3m_ouya
Config_version: V1.1.2
Install ROM - Unpack FlashTools, and Click on Flash_tool.exe - Select a the MT6592_Android_scatter.txt in ROM- Wait file to be added into Flash Tool- choose Option->USB Model,click USB Model–> Choose Option->DA DownLoad All->Speed->High Speed, click High Speed - Turn off your phone, remove the battery.- “Press F9 (hit Download button)” OR ” if upgrade ROM Firmware->Upgrade ”- and connect your phone into the computer via USB data cable. - The process will start and a red progress bar will appear after color purple, yellow.- And green circles display- Finish!
Here you have a video tutorial on how to upgrade to KitKat another MT6592 CPU smartphone, E-ceros One. 
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