Sony Xperia M5 Dual E5633 Update to Android Marshmallow 6.0 Stock Rom 30.2.B.1.21 Middle East Africa Generic. Download the FTF firmware file & Make Sure all drivers are correctly installed on your PC or laptop just Follow how to flash the firmware to your Sony Xperia device.
How to Update Sony Xperia M5 Dual E5633 to Marshmallow 6.0 Firmware
your need to check your Device firmware version, if your phone have Latest one just skipped this Guideline.
Get latest Sony Flashtool version from HERE
c) Download Marshmallow 6.0 for Africa Generic Sony XPERIA M5 Dual
d) Just Paste the Firmware FTF File in Sony Flashtool Folder
e) Run Xperia Flashtool, Tab Flash Option, And Choose Firmware File – If you Save your Important Data Just Uncheck user data.Sin file. Now Your Data Successfully Save in your Device. it’s Better for you (and that I Recommended that).
F) Switch off your M5 phone and when The Flashtool shows pop up window, Just Connect your M5 Device to Laptop or PC with pressing volume down Key
g) after Some Minutes all Installation procedure is Finished and your M5 Dual phone get the Newest Stock Rom After Then Just Restore your Personal Data.
Sony Xperia Bootloader Unlock