It is following 5 guidelines showing HOW TO:
1. install the newest Android 2.3.4 for your phone (for XPERIA Neo V MT11i it is currently the 4.0.2.A.0.62 firmware)
2. install the newest Android 4.0.4 for your phone (for XPERIA Neo V MT11i it is currently the 4.1.B.0.587 firmware)
3. backup your original firmware customization (it is important in case you must send your phone to service)
4. unlock the bootloader (in case you want to install the custom kernels with recovery menu and much more)
5. relock the bootloader (in case you want to go back to stock (original) ROM or you must send your phone to service)
1. how to install the newest Android 2.3.4 for Sony Ericsson XPERIA Neo V MT11i
a) first of all, check your firmware version (if you already have the newest one, you do not need this tutorial)
b) download and install latest Flashtool from this article
c) download also latest Android 2.3.4 (mirror) for Sony Ericsson XPERIA Neo V MT11i
d) paste the ftf file downloaded in step c) to folder „Firmware“ included in the XPERIA Flashtool
e) 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.
f) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding back button
g) after few minutes all is done and your phone gets the new firmware
a) first of all, check your firmware version (if you already have the newest one, you do not need this tutorial)
b) download and install latest Flashtool from this article
c) download also latest Android 2.3.4 (mirror) for Sony Ericsson XPERIA Neo V MT11i
d) paste the ftf file downloaded in step c) to folder „Firmware“ included in the XPERIA Flashtool
e) 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.
f) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding back button
g) after few minutes all is done and your phone gets the new firmware
2. how to install the newest Android 4.0.4 for Sony Ericsson XPERIA Neo V MT11i
a) first of all, check your firmware version (if you already have the newest one, you do not need this tutorial)
d) paste the ftf file downloaded in step c) to folder „Firmware“ included in the XPERIA Flashtool
e) 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.
f) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding back button
g) after few minutes all is done and your phone gets the new firmware
g) after few minutes all is done and your phone gets the new firmware
3. how to backup your original firmware customization
a) if you do not want to lose warranty of your phone, first thing you have to do is to backup your original customization
b) download Sony PC Companion and connect your phonec) select update your phone in Sony PC Companion
d) application will prompt you to disconnect your phone before starting downloading firmware, just make it (remember - dont disconnect your phone when update just start...)
e) after finish downloading firmware cancel the update
F) after that, go to C:\ProgramData\Sony Mobile\Update Engine\db\some number\blob_fs, there you find 3 (maybe 4) files, which names start FILE
g) download and install latest Flashtool from this articleh) paste the three files, which names start FILE, from blob_fs folder to folder „Firmware“ included in the XPERIA Flashtooli) open the Flashtool, click on Advanced, choose decrypt files and put all three files from blob_fs folder to the right colummj) click ok and after approx. one minute a pop up Window will appear via Flashtool
k) mark all files except simlock.ta and transfer them to the right column, than fill in a box in the right upper corner (fill in what you want, it is just for you)
l) now click ok and Flashtool will create backup of your original firmware customization, that you can anytime flash to your phone
b) download Sony PC Companion and connect your phonec) select update your phone in Sony PC Companion
d) application will prompt you to disconnect your phone before starting downloading firmware, just make it (remember - dont disconnect your phone when update just start...)
e) after finish downloading firmware cancel the update
F) after that, go to C:\ProgramData\Sony Mobile\Update Engine\db\some number\blob_fs, there you find 3 (maybe 4) files, which names start FILE
g) download and install latest Flashtool from this articleh) paste the three files, which names start FILE, from blob_fs folder to folder „Firmware“ included in the XPERIA Flashtooli) open the Flashtool, click on Advanced, choose decrypt files and put all three files from blob_fs folder to the right colummj) click ok and after approx. one minute a pop up Window will appear via Flashtool
k) mark all files except simlock.ta and transfer them to the right column, than fill in a box in the right upper corner (fill in what you want, it is just for you)
l) now click ok and Flashtool will create backup of your original firmware customization, that you can anytime flash to your phone
4. how to unlock your bootloader
b) start Flashtool and click on BLU button on the top
c) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding volume down button
d) click on get unlock key button, it will switch you to Sony Mobile website, here select your phone and hit continue
e) fill your email adress and accept terms and conditions, than click submit
f) go to your mailbox and click on Click here to proceeed link in mail from Sony Mobile
g) copy IMEI from Flashtool to Sony Mobile site and once more accept term and contidion, than click submit
h) copy unlock key to Flashtool window and than click unlocki) connect phone with holding volume up button when Flashtool shows pop up window
d) click on get unlock key button, it will switch you to Sony Mobile website, here select your phone and hit continue
e) fill your email adress and accept terms and conditions, than click submit
f) go to your mailbox and click on Click here to proceeed link in mail from Sony Mobile
g) copy IMEI from Flashtool to Sony Mobile site and once more accept term and contidion, than click submit
h) copy unlock key to Flashtool window and than click unlocki) connect phone with holding volume up button when Flashtool shows pop up window
j) wait to unlock finish
5. how to relock your bootloader
b) start Flashtool and click on BLU button on the top
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