On this page you will find the direct link to Download Sony Xperia C5 Ultra E5553 Stock Rom (firmware) from GoogleDrive. The Firmware Package contains FlashTool, Driver, Instruction Manual.
Model Name: Sony Xperia C5 Ultra E5553
File name: Sony_Xperia_C5_Ultra_E5553_29.2.A.0.129_1297-0356_Customized_TH
Android Version: 6.0 How to Flash: See Instructions
Download Size: 1.7 GB
Step 1: Download and Extract the Stock Firmware on your computer.
Step 2: After extracting the package, you will get Firmware, FlashTool and Driver.
Step 3: Install the USB Drivers (if usb driver is already installed then SKIP this step).
Step 4: Open FlashTool, and load the firmware (FTF) from the firmware folder.
Step 5: Connect your Sony Xperia Device to the computer.
Step 6: Click on the Flash button to begin the Flashing process.
Step 7: Once Flashing process is completed, disconnect your device.
See Detailed instruction with images
[*] Flashing the Stock Firmware will delete your personal data from the device. If in case you are going to Flash the above firmware then take a backup of your personal data, so that you can recovery your personal data if any thing wrong happens.