Phone is much lighter than XPERIA M2, but it also have large screen, bigger battery and much better performance. There is no flap on microUSB, but phone is still waterproof so you can use it in the rain etc. Below you can find the latest firmware for Sony XPERIA M4 Aqua Dual.
First of all one important thing – before you start to do anything with your phone, do the backup of your personal data. It is only for your safety in case that something goes wrong or any mistake happens. In that case you can use the backup to restore the data and try to do everything once again. Each tutorial has been done many times to verify its propriety, so just read carefully all instructions and continue step by step. The major part of every file has been created by myself and every file has been tested on the corresponding phone. All referenced files are determined for Sony XPERIA M4 Aqua Dual. So, what can you expect in terms of mentioned manuals / tutorials?
How to install Android 6.0.1 for Sony XPERIA M4 Aqua Dual E2303
a) download and install latest Flashtool
b) download Android 6.0.1 for Sony XPERIA M4 Aqua Dual
c) open the XPERIA Flashtool, click on flash and choose downloaded firmware, than click ok. Important – if you do not want to delete any data of your phone, just uncheck flashing userdata.sin file. All data will remain in your phone, but sometimes it can cause additional troubles. So it is better (and I recommend that) to do the backup of your personal data, than proceed with clean instalation and then restore your personal data.
d) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding volume down button
e) after few minutes all is done and your phone gets the new firmware