Zen Ultrafone E303 Quad Stock Firmware Stock ROM Download This Zen Ultrafone E303 Quad [SoC MT6582] Firmware, Stock ROM file can be used with any service tools capable of Flashing Stock ROM file on Zen Android devices. Stock firmware are mostly needed to either upgrade your Zen Ultrafone E303 Quad [SoC MT6582], downgrade it or, to simply flash the phone to correct certain software issues or malfunctions on the phone. Here on this page I have contained the download link for the complete Zen Ultrafone E303 Quad [SoC MT6582], Stock ROM file which can be used to flash factory OS back to your Zen Ultrafone E303 Quad [SoC MT6582]. How to Download Stock Firmware and Flash Zen Ultrafone E303 Quad [SoC MT6582] with the Stock ROM 1. Download SP Flash Tool from here and install it on your PC. If you dont have MTK Android drivers installed on your PC yet, you must install it too. Download VCOM Drivers here 2. Download your Zen Ultrafone E303 Quad [SoC MT6582] firmware, Stock ROM File from here. 3...