[Guide] [XAS] Xperia Unlocking bootloader, flashing ROMs/kernels (BPaul's 5.1.1) topic

This is a guide for XPERIA ACRO S (other xperia users can also reffer needed information)

I make this guide for noobs as there weren't such guide (even for my first time of flashing ROM I didn't get any such guide, so I decided to make one)

This Guide is especially for flashing BPaul's 5.1.1 ROM

So here Iam giving detail process to install Bpauls 5.1.1 with every links needed.

we are going to take below steps;

1. unlocking bootloader
2. flashing kernel with recoveries
3. backing up stock rom
4. installing bpauls 5.1.1

Special Thanks;

@BPaul (for awesome ROM)
@cobrato (for stock kernel)
@jajb (for gapps)


NOTE: I'AM NOT RESPONSIBLE IF YOU DAMAGED YOUR PHONE BY CROSS FLASHING OTHER ROMS,KERNELS ETC.
BELOW PROCESS IS SUCCESSFULLY CARRIED ON XPERIA ACRO S. AS NOOBS CAN MAKE MANY MISTAKES
I'AM NOT RESPONSIBLE FOR YOUR DAMAGE. -DO AT YOUR OWN RISK-



-Here we START-

*_UNLOCKING BOOTLOADER_*

(unlocking bootloader will erase everything on your phone, i suggest you to take backup of your data)

First of all you need to take unlocking code from official sony website (link below)

developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/

after clicking on above link, on the page scroll down

1.select your device

2.provide your imei

3.you'll get unlock code (save it properly)

Next you need to download minimal adb and fastboot (link below)

https://drive.google.com/file/d/0B1S...akE/view?pli=1

install it to your computer.

Now we have to connect phone in fastboot mode, follow below steps

1.Turn on usb debugging mode.

(setting > developer option > usb debugging)

2.Turn Off your Xperia Acro S

3.Press and Hold volume up button and then connect usb to computer.
(If you see Blue LED of phone, then everythis is going right)
(Let your computer install essential fastboot drivers)

Now open minimal adb and fastboot (we installed previosly)
Type below command

-fastboot devices

-fastboot -i 0x0fce oem unlock 0x(your unlock code without this brackets)

-fastboot reboot

DONE

(Now you have successfully unlocked your bootloader)


*_FLASHING KERNEL WITH RECOVERY'S_*

As you have STOCK ROM, you need to flash STOCK KERNEL with recoveries (link below)

forum.xda-developers.com/showthread.php?t=2309117

-The above kernel cantain CWN as well as TWRP

After opening above link, download respective kernel
Save the above downloaded kernel to fastboot folder on your computer.

-Get into fastboot mode and connect to computer

Now open minimal adb and fastboot (we installed previosly)
Type below command

-fastboot devices
-fastboot flash boot kernel_62B196_acroS.elf
-fastboot reboot

DONE

(Now you have successfully flashed kernel with recovery)


*_BACKINGUP STOCK ROM_*

As you have successfully flashed kernel with recoverys, its easy to take a full backup of your system.
To enter into recovery follow below steps

1.To get into CWM reboot your phone, press volume up key for few times when the magneta LED appears.
(To navigate use volume buttons, for selecting use power button)

2.To get into TWRP reboot your phone and tap the screen for few times when the magneta LED appears.

3.Select Backup.

DONE

(Now you have successfully Backedup your ROM)


*_FLASHING ROM BPaul's 5.1.1_*

For Flashing This ROM your phone (Xperia Acro S) needs to be rooted (if your not, use towelroot app, for me it was the easiest way to root my phone)
and USB Debugging in developers option should be enabled.


A] Download ROM BPaul's 5.1.1 (link below)

forum.xda-developers.com/showthread.php?t=2799765&page=54#post60570826

-Extract the above downloaded ROM to your computer
(you'll see 2img files and 2recoveries)



B] Here you need to download acro s kernel (link below)

d-h.st/nJXM



C] Download below minimal GApps for 5.1.1 and copy it to your sdcard/ext_sdcard(link below)

forum.xda-developers.com/android/software/gapps-google-apps-minimal-edition-t2943330

(keep this downloaded kernel to above extracted folder)

Now to flash this rom you need to download FLashtool (link below)

d-h.st/Kb8

install the above downloaded Flashtool to your computer.

1.Now to flash recovery open the extracted ROM, and open recovery folder (2recoveries)

2.Pick your Recovery CWM or TWRP (TWRP Recommended) and copy it to internal storage of your phone.

3.Open minimal adb and fastboot

Type below command;

-adb shell
-su
(confirm popup su request from your phone)
-dd if=/sdcard/twrp.img of=/dev/block/mmcblk0p11 OR dd if=/sdcard/cwm.img of=/dev/block/mmcblk0p11

Now you need to flash 2img files, to do so follow below steps

1.Open Flashtool

2.Click Flash button (Lightning icon, top left)

3.Select Fastboot mode

4.Reboot phone to fastboot (power off phone>push vol up key and connect usb)

5.Now in flashtool select SYSTEM to flash and open system.img (wait for 6 minimum minutes)

6.Now select KERNEL to flash and open boot_07_05_15.img

7.Now select REBOOT DEVICE INTO SYSTEM.

8.Open your respected recovery (CWM or TWRP)

9.Install>your downloaded gapps from sdcard/ext_sdcard

10.Wipe cache + Dalvic cache + Factory reset

11.Reboot

DONE
(You have successfully installed BPaul's 5.1.1)