09 October 2017

How to fix dual SIM in Sony Xperia C3 Dual (S55T) from the single SIM

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09 October 2017
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Sony Xperia C3 Dual (S55T) flash file is tested by me and it is working very well without any error, can use this flash file when device can use this guide when device in Remove Virus, pattern lock, hard reset, flashing, software update, update, format, reset, phone lock, sim lock, pattern reset, pin lock, flash, hang on logo, only logo solve, hang logo solution, hang problem, firmware update, pattern lock, pattern unlock, pattern reset, phone lock, phone reset, format, hang on logo done, sim lock, screen lock, screen unlock, pin lock, stuck on logo done, user name password id problem, fix unfortunately app has stopped, unfortunately app has stopped working, unfortunately app store has stopped, unfortunately apps has stopped, unfortunately your app has stopped, auto turn on internet connection, auto turn on WiFi connection, auto app installing, auto gone balance etc these type issues can use this way etc. This is used  without any tool and box.and also free for all who has knowledge about software in mobiles.for flashing file it is most important to first check micro USB cable. if it is not good, can not flash it. and the another one is to check device battery. it should not be low, it can stop device between flash. before the flash, it is necessary to save data like contacts, photos, videos and other important things.
If want to repair Sony Xperia C3 Dual (S55T) device, can try to repair it by. have to charge a battery with any charger and charged it by 85%. Your data is very important for so it is good to do a backup of data it may consist of contact details, important messagesemails or any other important thing which feel to be the backup in a device. This backup can be done on another device. we have to do the backup because after a format of a device, all data will be gone and it will not be recovered. For backup in other devices, you can use another external device like hard drive, SD card or any other suitable devices. If are doing by own. do it at your own risk as we don't take any responsibility if a device is damaged
Download Links
Sony Xperia C3 Dual (S55T) Stock ROM (Flash file)

Sony Xperia C3 Dual (S55T) USB Driver

Sony Xperia C3 Dual (S55T) Flash tool

Required for Flash:

  • Sony Xperia C3 Dual (S55T) device with full charged battey do not try with low battery
  • Sony Xperia C3 Dual (S55T) Stock ROM Firmware
  • Sony Xperia C3 Dual (S55T) USB Driver
  • Sony Xperia C3 Dual (S55T) Flash Tool
  • Micro USB cable with good quality
  • Computer or Laptop


  • Download all are files from above link (if link dead or not working just leave your message on below comment box I will soon fix it if possible)
  • Copy S55t_19.2.2.B.0.144_1290-4069_R3B.ftf flash file only
  • Open C:\Users\Username\.flashTool\firmwares path and Paste here file
  • Open Sony Mobile Flash tools
  • Click on Firmware button see below image
  • Now and choose " FlashMode " button and then press OK button see below image
  • Choose your Paste unlock file and click on OK button then wait until second windows opened
  • If second windows screen open like see below image (Note: below image just for example do not following procedure)
  • Press and hold Volume Down Button and insert USB cable
  • You are done
Sony Xperia C3 Dual (S55T) Flash done Screenshot:

This video for hint
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