[Xperia Z1 General] anburaj:
Update : 03.08.2015 Update with Full Erase it will bring back your best bettery performance.

in the recovery Format the internal SD Storage and update .270. All the steps still same, Before install flashable.zip format your internal SD.... Thats it

Who are in .242 frimware just download the new .270 frimware follow the same steps.... as .242

in this time no need to flash the boot img.....

1.Download Firmware....

2.create FTF File and make Flashable .Zip

3 Copy to External SD ....

4. Before Do anything make a proper backup...in this time you have to format your inernal sd....

5. you have rooted .242 frimware Download Here install Z1 Dual Recovery installer.zip... extract the zip file run the .bat file it will install the recovery

6 boot in recovery... Format the internal SD ....then install the flashable.zip and clear the caches.. Enjoy....

Update : 22.06.2015 dont update .270 Or .283(t-mobile) Firmware its drain's battery quick its only 15 to 16 hours on normal usage....

I am new to XDA its my first Post.....

sorry if any mistake....in my writing...

Root Xperia Z1 C6903 user may Check this method in other Z1 Variant.. not operator customized variant...

this is the simple way to root Z1 in 5.0.2 new stock FTF..

Reqr:-

Xperia Z1 C6903 unlocked bootloader..with android 5.0.2 (.242) & 60%of charge

Xperia flash tool..... Click here with xperia Z1 driver

To Download Xperia Device's Firmware File .FTF Click Here XperiFirm you need to copy .exe to Xperia Flashtool Folder and run from that folder..

PRF Creator.....Click here

SuperSu Binary...Click here

Recovery image....Download here

Dual recovery Flash able Zip file..Downlaod here

Procedure.. Before proceed prepare all reqired file its only take 5 mins.....

Now run PRFC and add all three required files(.ftf,SuperSu,Recovery) in it.

Then click on Create.

Once the Flashable ROM is created, it will show finished. now the flashable.zip file created in the same PRF Creator folder..

Do not touch any other option while creating the pre-rooted firmware.

Now copy the flashable.Zip firmware to the phone’s internal storage

Step 1: Connect the phone with usb Debugging. mode

Step 2: Open the flashtool thunder icon select Fastboot mode...

Step 3:Select option reboot in fastboot mode via adb...(or simply connect phone in fastboot using press volume (+) while connect the usb

Step 4:Again click reboot in fastboot via fastboot

Step 5:Now click select kernel to flash.. now browse (.img extension) and select boot_2.img file download..

Step 6:Now disconnect the phone from pc. boot into recovery using power on the phone its show sony logo the press volume (-)

Step 7:now you are CWM Recovery... install .zip from sd storage ...select the flashable.zip and install it...once finished ..power off the phone using recovery advance option...

Step 8:Now open flashtool in pc select thunder icon select flashmode select .242 firmware in Wipe Option tick APPSLOG, CACHE & untick DATA. in Exclude tick SYSTEM

Step 9: Now Click Flash....Connect the phone Dialog Window Will Appear now connect the phone USB together press volume (-)

release the button when dialog window disappear

now the your pc detect your phone in flashmode and flash the firmware..... only 2 mins completed..

Step 10:Now disconnect from pc. power on the phone ....that's it...now your phone rooted......Enjoy :good:

if any Question's ask me...