yashsingh1/xdaforums huggingface dataset:
[Sony Xperia M4 Aqua] Flamenawer:
Yes, one time,but I dont kow why, but in the next times,happened. If you install xposed the data partition will be corrupted. You can fix with a hard reset,flash rom with system excluded, I tried all, but you will lose the camera. I flash 10 times and tried all to save the camera.

Finally, I'm looking for a cross compiled camera fjron Z3 or Z3+
[Sony Xperia M4 Aqua] Hnk1:
Check Post #5 of this thread for all memory and storage problems.
[Sony Xperia M4 Aqua] bk76:
unlock bootloader

Hi, I'm trying to unlock bootloader in my m4 aqua using FlashTool. When I click the BLU button FlashTools asks me to unplug device->turn off device->hold volume down button->plug device and after I do this it asks me again to unplug device->turn off device->hold volume up button->plug device and when I do this it stops at this point. In log I see info: "Device connected in fastboot mode", there is blue led on the phone but nothing happens. What should I do?
[Sony Xperia M4 Aqua] kpbs92:
Probably drivers aren't installed install fastboot and flash drivers from drivers folder.. In windows 7 or higher there is a specific way of installing it..google it and see..:good:
[Sony Xperia M4 Aqua] bk76:
I use Linux. I tried under windows 8 but it didn't work at all, I couldn't pass first step.
[Sony Xperia M4 Aqua] Hnk1:
If you check the first few posts, post#3 to be precise, I have already mentioned how to install drivers by different methods.

http://xdaforums.com/showpost.php?p=61227900&postcount=3
[Sony Xperia M4 Aqua] bk76:
I can't find anything about Linux drivers there
[Sony Xperia M4 Aqua] kpbs92:
can't we flash .112 kernal to 2.99 to get performance out of it ?? other than debolting what can i do to make it faster and give bench mark 30000+ ??
[Sony Xperia M4 Aqua] RohitBopnna:
In the flash tool, put a tick for boot delivary (Exclude) and flash.

Or download or create a FTF file that includes the BootDelivary files.
[Sony Xperia M4 Aqua] bk76:
I don't know what happened but I think that somehow I managed to unlock bootloader. This are the steps:

I was trying to record my desktop when trying to unlock bootloader. I got to the second step as usual but then my mother came to me so I unplugged my phone and went to see her. When I came back to my computer there was window with my IMEI asking for unlock code. I typed the code but the phone was not in fastboot and error appeared. So I tried once again BLU button. But after first step (green led) there was window with IMEI and unlock code. I clicked unlock and in log there was few lines with text and unlock successful message.

p.s.

This is my log:

19/046/2015 18:46:42 - INFO - Please connect your device into flashmode.

19/046/2015 18:46:54 - INFO - Device connected in flash mode

19/046/2015 18:46:54 - INFO - Opening device for R/W

19/046/2015 18:46:54 - INFO - Device ready for R/W.

19/046/2015 18:46:54 - INFO - Reading device information

19/046/2015 18:46:54 - INFO - Phone ready for flashmode operations.

19/046/2015 18:46:54 - INFO - Opening TA partition 2

19/046/2015 18:46:54 - INFO - Current device : E2303 - YT9115CGRP - 1293-9369_R15A - 1291-5963_26.1.A.2.99 - GENERIC_26.1.A.2.99

19/046/2015 18:46:54 - INFO - Closing TA partition

19/046/2015 18:46:54 - INFO - Processing loader.sin

19/046/2015 18:46:54 - INFO - Checking header

19/046/2015 18:46:54 - INFO - Flashing data

19/046/2015 18:46:55 - INFO - Loader : S1_Root_54c8 - Version : MSM8936_14 / Boot version : S1_Boot_MSM8936_LA2.0_33 / Bootloader status : ROOTABLE

19/046/2015 18:46:55 - INFO - Max packet size set to 512K

19/046/2015 18:46:55 - INFO - Opening TA partition 2

19/046/2015 18:46:55 - INFO - Start Reading unit 000008B2

19/046/2015 18:46:55 - INFO - Reading TA finished.

19/046/2015 18:46:55 - INFO - Closing TA partition

19/047/2015 18:47:02 - INFO - Unlocking device

19/047/2015 18:47:02 - INFO - Opening TA partition 2

19/047/2015 18:47:03 - INFO - Writing TA unit 000008B2. Value : [30, 78, 38, 33, 46, 35, 39, 30, 37, 39, 36, 44, 31, 44, 32, 31, 44, 38]

19/047/2015 18:47:03 - INFO - Closing TA partition

19/047/2015 18:47:03 - INFO - Unlock finished

19/047/2015 18:47:17 - INFO - Ending flash session

19/047/2015 18:47:17 - INFO - You can now unplug and restart your device.

Is it unlocked now?
[Sony Xperia M4 Aqua] Hnk1:
Linux Drivers updated as well.

Usually as long as the android version is same it doesnot matter, however, I wouldnot advise you to do so. Wait for Custom Kernel for your device. I can guide you better if you can send me your drawer's screenshot
[Sony Xperia M4 Aqua] bk76:
This is not Linux drivers what you are describing. You are describing how to change usb connectivity mode in phone settings. Unfortunately I don't have this option in my Sony Xperia m4 aqua.

p.s.

under Linux FlashTool just works, I didn't need to install any drivers.
[Sony Xperia M4 Aqua] stoeggich:
20/047/2015 14:47:40 - INFO - Flashtool Version 0.9.19.3 built on 13-09-2015 17:00:00

20/047/2015 14:47:40 - INFO - Executing search strategies to find proxy selector

20/047/2015 14:47:41 - INFO - No proxy found for IE. Trying next one

20/047/2015 14:47:41 - INFO - Proxy found for firefox

20/047/2015 14:47:41 - INFO - Syncing devices from github

20/047/2015 14:47:42 - INFO - Scanning devices folder for changes.

20/048/2015 14:48:11 - INFO - Pulling changes from github.

20/048/2015 14:48:13 - INFO - Devices sync finished.

20/048/2015 14:48:14 - INFO - Device disconnected

20/048/2015 14:48:20 - INFO - Please connect your device into flashmode.

20/048/2015 14:48:31 - INFO - Device connected in flash mode

20/048/2015 14:48:32 - INFO - Opening device for R/W

20/048/2015 14:48:32 - INFO - Reading device information

20/048/2015 14:48:33 - INFO - Phone ready for flashmode operations.

20/048/2015 14:48:33 - INFO - Opening TA partition 2

20/048/2015 14:48:33 - INFO - Current device : E2303 - YT9113B6LB - 1295-6657_R7A - 1291-5963_26.1.A.2.99 - GENERIC_26.1.A.2.99

20/048/2015 14:48:33 - INFO - Closing TA partition

20/048/2015 14:48:33 - INFO - Processing loader.sin

20/048/2015 14:48:33 - INFO - Checking header

20/048/2015 14:48:33 - INFO - Flashing data

20/048/2015 14:48:34 - INFO - Loader : S1_Root_54c8 - Version : MSM8936_14 / Boot version : S1_Boot_MSM8936_LA2.0_33 / Bootloader status : NOT_ROOTABLE

20/048/2015 14:48:34 - INFO - Max packet size set to 512K

20/048/2015 14:48:34 - INFO - Opening TA partition 2

20/048/2015 14:48:34 - INFO - Start Reading unit 000008B2

20/048/2015 14:48:34 - INFO - Reading TA finished.

20/048/2015 14:48:34 - INFO - Closing TA partition

20/048/2015 14:48:34 - INFO - Ending flash session

20/048/2015 14:48:34 - INFO - Your phone bootloader cannot be officially unlocked

20/048/2015 14:48:34 - INFO - You can now unplug and restart your phone

20/048/2015 14:48:34 - INFO - Device connected in flash mode

20/048/2015 14:48:35 - INFO - Device disconnected

20/048/2015 14:48:41 - INFO - Device connected in flash mode

What is the problem?

C:\Users\xxx\.flashTool\registeredDevices\E2303\ulcode.txt

code:YT9113B6LB
[Sony Xperia M4 Aqua] kpbs92:
anyone tried new firmware :confused: .147
[Sony Xperia M4 Aqua] MK99:
Where to get it?
[Sony Xperia M4 Aqua] verioananta:
how we can backup TA partition when we need UBL for Root this device?
[Sony Xperia M4 Aqua] freeacer:
Not rootable? Do you have got disable my Xperia theft protection?

SONY XPERIA M4 AQUA E2303

---------- Post added at 10:02 AM ---------- Previous post was at 09:59 AM ----------

It is the old firmware, which made for showroom shop only. Video preview starting random on background and it is not possible to stop...

SONY XPERIA M4 AQUA E2303
[Sony Xperia M4 Aqua] kpbs92:
check at xperia firm 4.7 :p
[Sony Xperia M4 Aqua] kpbs92:
there is an update certified 26.1.A.2.147 on 18 sep but still no rolling the update anyone knows the date when will it be rolling ??:confused:
[Sony Xperia M4 Aqua] CoreyHUN:
Hey, where can i check my unlock code for ulcode.txt?
[Sony Xperia M4 Aqua] EnricoLH:
I think it's time to create an organic and comprehensive guide. We've at least 3 different posts, with spread instructions and tens of links.

I would write it by myself, but I don't have enough experience. I hope that someone able to do that will read this message. I thank Hnk1, however this kind of post is supposed to be a well organized total-guide, but it's outdated and confusing.
[Sony Xperia M4 Aqua] Hnk1:
I'll update it by 15th October. Got exams , very busy now
[Sony Xperia M4 Aqua] MK99:
Anyone tested? I have unlocked and rooted, so I don't need...

http://xdaforums.com/crossdevice-dev/sony/root-how-to-root-5-0-lollipop-t3212108
[Sony Xperia M4 Aqua] alby_var:
I not tested it, but i think it will work.... because use a similar method of our.
[Sony Xperia M4 Aqua] Gilmour79:
It didn't work for me with 26.1.A.2.99 version.
[Sony Xperia M4 Aqua] jlamaeli:
Same here !
[Sony Xperia M4 Aqua] doom_st:
same here with 26.1.A.2.99

i'll try with 26.1.A.1.128

maybe CVE-2015-3636 vulnerability is fixed @ 2.99
[Sony Xperia M4 Aqua] liniker santos sousa:
sorry my haste , we do not have the root 100 % in xperia m4 aqua ? waiting ...

ps. I am Brazilian and my English is ****
[Sony Xperia M4 Aqua] General Riviera:
I'm beginning to hate this phone so much. I fully intend on buying something else. This one can go for a swim at the bottom of a lake.
[Sony Xperia M4 Aqua] Hnk1:
Never quote the whole post

GUIDE UPDATED EVERYONE. ENJOY
[Sony Xperia M4 Aqua] FirstMn:
DRM Keys lost ?

Hello,

i successfully unlocked bootloader . :) (I mean its hard, and data will wipe, but nothing, very easy)

But i mean when unlock bootloader i lost all DRM keys.

I lost only first 4, Marlin, Marlin_import, CKB, Widevine. Other are ok.

I am feel good i not lost all but, its normal ? :D
[Sony Xperia M4 Aqua] RohitBopnna:
the once you lost as the important ones, have you not looked or searched in the forums before unlocking. You will never be able to get back to sony for warranty.

and the stock firmware will never be the same again.
[Sony Xperia M4 Aqua] mikropixel1:
how do i get the unlock code for the bootloader

---------- Post added at 10:29 PM ---------- Previous post was at 10:25 PM ----------

please can you tell me how to get the bootlocker code
[Sony Xperia M4 Aqua] freeacer:
You just only check the guide... When you proceed step by step you will get to done... But you must to know CMD guide... Little bit....

I mean unlock bootloader and upload recovery and supersu... When did you use CMD anytime?

---------- Post added at 11:34 PM ---------- Previous post was at 11:31 PM ----------

At the Sony web Page... Google helps you
[Sony Xperia M4 Aqua] mikropixel1:
i cant find where it says it in the guide
[Sony Xperia M4 Aqua] freeacer:
http://developer.sonymobile.com/unlockbootloader/
[Sony Xperia M4 Aqua] mikropixel1:
the device isnt listed there
[Sony Xperia M4 Aqua] freeacer:
Choose M2 model
[Sony Xperia M4 Aqua] ITRCSS:
Does it really work? Anyone tested it?
[Sony Xperia M4 Aqua] 99poison:
This is the flashtool log.

I can unlock bootloader successfully with flashtool 0.9.84. But I can't flash recovery. I use this command

fastboot flash recovery recovery.img. It display Command not allowed. Anyone can help? My device is

Sony Xperia M4 Aqua E2312. Thank.
[Sony Xperia M4 Aqua] freeacer:
Yes of Course... You can Choose M or M2 or M Dual.... You will to get the same code...

I have got rooted m4aqua by this metod...
[Sony Xperia M4 Aqua] ITRCSS:
And after you unlock the bootloader, how did you root?
[Sony Xperia M4 Aqua] M4Aqua:
i dont think that the screenshots will help you^^

USB debugging is on and the right drivers installed...

The phone ist connecting with all of your methods... runs until 100% and then it says that they could not root this device...

i tried any other of your method, too ...

dont know why this dont work :D
[Sony Xperia M4 Aqua] MetalOllie:
Root Genius was one of the first methods I tried. Doesn't work. If you have any confirmations from people who have successfully rooted the M4 with it, can you cite them or post screenshots?
[Sony Xperia M4 Aqua] Hnk1:
Can you try the exploit method?

If successful, your phone should reboot and ask for Adb Shell permission which you should grant it.

If not, rerun the script and see if that helps!

http://xdaforums.com/devdb/project/dl/?id=10920&task=get
[Sony Xperia M4 Aqua] MetalOllie:
Link isn't working for the exploit (at least not on an iPad).
[Sony Xperia M4 Aqua] Hnk1:
Works fine for me on chrome Windows PC

http://xdaforums.com/devdb/project/dl/?id=12249&task=get
[Sony Xperia M4 Aqua] M4Aqua:
is not working...

here the screenshot
[Sony Xperia M4 Aqua] MetalOllie:
It's ok, I found it, by removing "get" from the end of the link.. Don't think the iPad liked that bit!

Giefroot doesn't work on Lollipop unfortunately.
[Sony Xperia M4 Aqua] Hnk1:
Wait I will upload three new scripts as zip
[Sony Xperia M4 Aqua] Hnk1:
See if you can go through now ?

try again script if it doesnot work.

Use another PC

Also you can provide the following output / information:

Device model / firmware version

Kernel version (cat /proc/version)

adb shell "ls -l /data/local/tmp/"

adb shell "cat /data/local/tmp/giefrootlog"

adb shell "cat /proc/last_kmsg"
[Sony Xperia M4 Aqua] M4Aqua:
same as a few minutes ago...

fails cause of no supported kernel...

unfortunately i havent a second pc to try it out^^
[Sony Xperia M4 Aqua] MetalOllie:
You could try it on 20 PC's and the result would be the same. Giefroot will not work on Lollipop. The fact is, unfortunately, there is currently NO method available for successfully rooting the M4, and to be honest, I really don't see the benefit in posting rooting methods which have been proven not to work, or, in the case of some, are intended for Gingerbread devices. Attempting to root a phone with the wrong exploits is a great way of bricking a phone.
[Sony Xperia M4 Aqua] banciii:
http://android-root-guide.com/tutorial/sony-xperia-m4-aqua.html

Fake or fake? :D
[Sony Xperia M4 Aqua] Desakato:
Ultra Fake xD

Saw it a few hours ago

So, I'm Spanish and my M4 is from a company called "Yoigo". The problem is that yoigo's 3 and 4g network works bad in some cases with push notifications.

When I lock my M4, notifications such as facebook, whatsapp, gmail and some others doesnt arrive unless I power on the screen and wait 10 or 15 seconds for 3g to connect

There is an app called root push notifications fixer but it needs root privileges so here I am, waiting as my life depends on it

I know you may not give a sh*t about it, but I needed to tell someone :rolleyes:
[Sony Xperia M4 Aqua] trungarow:
This is cheating. SH.I.T
[Sony Xperia M4 Aqua] Hnk1:
I'm still working on an exploit. Lets hope I'm successful. The only problem is that I don't have the device yet which is hindering the process.
[Sony Xperia M4 Aqua] M4Aqua:
How long do you think will it take until the root is successful?
[Sony Xperia M4 Aqua] banciii:
Yet? It means u will get one?

Never ask ETAs :P
[Sony Xperia M4 Aqua] Hnk1:
I am actually waiting for the 16Gb sim free version. Not available in my region yet. However, could take few weeks before I get the device
[Sony Xperia M4 Aqua] M4Aqua:
Then i think i gonna give the Phone back and get my money :D

I ll buy a new Phone :D may be the Huawei p8 lite
[Sony Xperia M4 Aqua] trungarow:
Sorry, I didn't mean to this thread. I mean http://android-root-guide.com/tutorial/sony-xperia-m4-aqua.html

Fake or fake? ￼

And thanks for your efforts to help
[Sony Xperia M4 Aqua] mikropixel1:
stuck in bootloop

can someone help me as i am stuck in a bootloop and my phone wont turn on.

this happened after i tried to root the phone by flashing recovery.img

i fixed the problem with sony pc companion
[Sony Xperia M4 Aqua] Reizoko:
Hey,

Got my phone rooted perfectly with this guide!

The post describing this process and additional tweaks I made is here: http://xdaforums.com/showpost.php?p=63261632&postcount=26

Posted it under - "My experiences..."

Cheers!
[Sony Xperia M4 Aqua] Norbix029:
How to lock the bootloader to give your phone to a warranty ?

How to lock the bootloader to give your phone to a warranty ?

What with the keys DRM ?

I lock so the bootloader on Xpeira M4 Aqua and take me to his normal warranty :

Relock your bootloader

a) Start Flashtool and click on the BLU button on the top

B ) Turn off your phone and when Flashtool shows pop-up window , connect phone to PC with holding volume down button ( to boot in Flashmode )

c ) just click a button and your relock the bootloader is locked for now
[Sony Xperia M4 Aqua] ITRCSS:
I think I've manage to unlock the bootloader, here is the log:

13/021/2015 07:21:17 - INFO - Flashtool Version 0.9.19.10 built on 04-10-2015 21:00:00

13/021/2015 07:21:17 - INFO - Executing search strategies to find proxy selector

13/021/2015 07:21:17 - INFO - No proxy found for IE. Trying next one

13/021/2015 07:21:17 - INFO - No proxy found for firefox. Trying next one

13/021/2015 07:21:17 - INFO - No proxy found for java. Trying next one

13/021/2015 07:21:17 - INFO - Syncing devices from github

13/021/2015 07:21:17 - INFO - Scanning devices folder for changes.

13/021/2015 07:21:23 - INFO - Pulling changes from github.

13/021/2015 07:21:24 - INFO - Devices sync finished.

13/021/2015 07:21:28 - INFO - Device disconnected

13/021/2015 07:21:29 - INFO - Please connect your device into flashmode.

13/021/2015 07:21:41 - INFO - Device connected in flash mode

13/021/2015 07:21:41 - INFO - Opening device for R/W

13/021/2015 07:21:41 - INFO - Reading device information

13/021/2015 07:21:41 - INFO - Phone ready for flashmode operations.

13/021/2015 07:21:41 - INFO - Opening TA partition 2

13/021/2015 07:21:41 - INFO - Current device : E2303 - YT9116PR8G - 1293-7718_R9A - 1291-5963_26.1.A.2.99 - GENERIC_26.1.A.2.99

13/021/2015 07:21:41 - INFO - Closing TA partition

13/021/2015 07:21:41 - INFO - Processing loader.sin

13/021/2015 07:21:41 - INFO - Checking header

13/021/2015 07:21:41 - INFO - Flashing data

13/021/2015 07:21:42 - INFO - Loader : S1_Root_54c8 - Version : MSM8936_14 / Boot version : S1_Boot_MSM8936_LA2.0_33 / Bootloader status : NOT_ROOTABLE

13/021/2015 07:21:42 - INFO - Max packet size set to 512K

13/021/2015 07:21:42 - INFO - Opening TA partition 2

13/021/2015 07:21:42 - INFO - Start Reading unit 000008B2

13/021/2015 07:21:42 - INFO - Reading TA finished.

13/021/2015 07:21:42 - INFO - Closing TA partition

13/021/2015 07:21:56 - INFO - Unlocking device

13/021/2015 07:21:56 - INFO - Opening TA partition 2

13/021/2015 07:21:56 - INFO - Writing TA unit 000008B2. Value : [59, 54, 39, 31, 31, 36, 50, 52, 38, 47]

13/021/2015 07:21:56 - INFO - Closing TA partition

13/021/2015 07:21:56 - INFO - Unlock finished

13/022/2015 07:22:36 - INFO - Ending flash session

13/022/2015 07:22:36 - INFO - You can now unplug and restart your device

13/022/2015 07:22:36 - INFO - Device connected in flash mode

13/022/2015 07:22:37 - INFO - Device disconnected

13/022/2015 07:22:39 - INFO - Device connected in flash mode

13/022/2015 07:22:45 - INFO - Device disconnected

But now I can't flash the recovery. This is what happened:

C:\Users\ITRCSS\AppData\Local\Android\sdk\platform-tools>fastboot flash recovery recovery.img

target reported max download size of 268435456 bytes

sending 'recovery' (28188 KB)...

OKAY [ 0.888s]

writing 'recovery'...

FAILED (remote: Command not allowed)

finished. total time: 0.894s

Some help please!
[Sony Xperia M4 Aqua] husam666:
Your bootloader is locked
[Sony Xperia M4 Aqua] ITRCSS:
So what I'm doing wrong?
[Sony Xperia M4 Aqua] Pkandu:
sony m4 aqua

How to Unlock my bootloader,and root,I want to use cyanogen12.1 lollipop/6.0 marshmallow,,plz can any body give step by step procedure
[Sony Xperia M4 Aqua] Reizoko:
Guys, guys, guys!

Found out what's the case of games lagging/stuttering with our precious M4 Aqua. After I rooted and fiddled with all the settings and Link2SD so I don't have any storage problems (described above by me) I tried games and apps. Installed ****loads just to see how the phone performs. Most of them were lagging and I had FPS stutter all the time no matter what. Some games, which were very CPU/GPU intensive behaved normally. Then I thought, why the heck not to install No Frills CPU-Control from Google Play Market. I'd think that default kernel doesn't allow setting anything but I was wrong because it does. Default settings are bottlenecking games I think, because it's interactive set at minimum of 400MHz and max of 1.459Ghz. Changed things to 1,459Ghz @ min/max and set Performance. I understand that this will make my battery last less and probably cause some heat. I'll be fiddling with settings to find out what's the best for me.

I must say that this change (CPU governor and min/max) is a day and night difference in gaming @ M4 Aqua.

I can now smoothly play games as intended, and the phone is smoother as well. Make sure you check it out, you rooted ones ;)
[Sony Xperia M4 Aqua] husam666:
You either have xperia theft protection enabled, or your phone doesn't have an unlockable bootloader
[Sony Xperia M4 Aqua] ITRCSS:
Should I do a factory reset, don't log-on any account, and try to unlock the bootloader?

Thanks
[Sony Xperia M4 Aqua] ITRCSS:
And How I disable the theft protection.
[Sony Xperia M4 Aqua] ZeistX:
seriously ? no fps drop ? xDD

glad to hear :D

can u make a video of all game ? :D
[Sony Xperia M4 Aqua] husam666:
No

It's probably in settings>security -___-
[Sony Xperia M4 Aqua] ITRCSS:
What should i do then? try to flash another ROM with the "yes" on "Rooting Status"? Guive-me ideas pls.
[Sony Xperia M4 Aqua] Striike:
can u pls halp me

My Problem : IN Flashtool i cant find the "device number" can you please tell more about how to find it :confused: i have clicked on blu and then it asks me which device i use.( Im in Flashmode) Then i click on m4 aqua and it says that there is no official unlock avaible. Sorry for very very bad english Im from germany :3
[Sony Xperia M4 Aqua] MK99:
On the phone do this:

Settings - About phone - Status

Scroll to down and there you can see: Serial number.
[Sony Xperia M4 Aqua] Reizoko:
Hey,

Just for a proof I made short video showing how does Riptide GP2 performs on stock and with performance settings. The difference is staggering.

Movie explains all settings I used. Here it is: https://www.youtube.com/watch?v=MAvnq4t5DyI&feature=youtu.be

Cheers
[Sony Xperia M4 Aqua] ZeistX:
woahh thanks for your feedback , wew i think im also need tu UB and root it , but im scared of Warranty will void . Haha . but im really want to play game without fps dropping >.< .

thanks so much !
[Sony Xperia M4 Aqua] shashank281295:
Hello, i have sony m4 aqua e2363. Installed flashtool. Installed drivers from everywhere possible. Still flashtool says driver not installed. Please help. Thanks.
[Sony Xperia M4 Aqua] Hnk1:
Did you check first few posts on first page how to install drivers easiest way ?

It says All drivers problem
[Sony Xperia M4 Aqua] TheShadow523:
Are you running windows 7 or 8/8.1? If you are on 8 then you need to troubleshoot and go into advance start up and then you need to disable 'Driver Signature Enforcement'. I'm not sure if there is a a thread in XDA but this worked for me.

If you have windows 7 however I'm not sure why you are having problems.
[Sony Xperia M4 Aqua] shashank281295:
Thank you for the support. Successfully unlocked bootloader and rooted the phone.
[Sony Xperia M4 Aqua] Hnk1:
Im glad you did it successfully. You can write down your steps so others can also learn from your experience.

please quote me or mention me in case you need any further help.
[Sony Xperia M4 Aqua] shashank281295:
Disabled signature verification for Windows 8. Installed flashtool drivers. Unlocked bootloader through flashtool. Rooted with adb by entering the commands one by one. :)