Sony Ericsson P1i Firmware Flashing

Goto Main Menu and tap More then to System Information, scroll below

Changing CDA And Flashing Latest Firmware (GW1/GW2)

01. Download and install XS++
02. Download and install SEUS
03. Start XS++, check ‘SMARTPHONE CONNECT’, and press ‘Connect’.
04. Turn off your phone, remove the battery for 2 seconds, and put it back, and hold on ‘C’ button, and connect your phone with USB cable.
05. Select ‘GDFS’, and press ‘backup GDFS’.
06. After done, unplug the USB cable.
07. Restart XS++, check ‘SMARTPHONE CONNECT’, and press ‘Connect’.
08. Remove the battery for 2 seconds, and put it back, and hold on ‘C’ button, and connect your phone with USB cable.
09. Under ‘Write Smartphone CDA/Version change’, select ‘P1i_R9G007_R2A03_R6D23_CDA162022_1(GW1)_R6D22.gdfs’, and press ‘Run Script’.
10. After done, run SEUS and follow every steps given.
11. Wait
12. Wait
13. Done, unplug the USB cable, remove the battery for 2 seconds, and put it back, and turn on your phone.
14. Wait
15. Wait
16. You should have the latest firmware of installed in your phone already.

p/s/i: For safety, please do not miss any one step, or your phone will explode and half of the Earth will gone.
p/s/ii: FLASH AT YOUR OWN RISK.

Singapore
i)Download XS++
ii) tick smartphone connect
iii) press connect
iv) turn off your phone, remove and put back the battery, connect the USB cable while holding C button.
v) select GDFS and press backup GDFS
vi) unplug the USB cable
vii) restart XS++ (not necessarily but i found my XS++ to be error without restarting it)
viii) turn off your phone, remove and put back the battery, connect the USB cable while holding C button.
ix) download the “cda95.zip” and unzip it into the text file cda95.zip (attached)

x) open XS++ and reconnect the phone as mentioned above
xi) go to GDFS section and load the txt file as script
xii) Run the script
xiii) Disconnect and run SEUS
xiv) Update your phone as usual and voila

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Hong Kong
i)Download XS++
ii) tick smartphone connect
iii) press connect
iv) turn off your phone, remove and put back the battery, connect the USB cable while holding C button.
v) select GDFS and press backup GDFS
vi) unplug the USB cable
vii) restart XS++ (not necessarily but i found my XS++ to be error without restarting it)
viii) turn off your phone, remove and put back the battery, connect the USB cable while holding C button.
ix) select the Hong Kong /74 CDA from the drop down menu and execute.
x) disconnect the phone
xi) start SEUS and update the phone

There’s always risk when messing around the ROM. General rule of thumb should be DO NOT disconnect USB or power off the pc during the process. All the steps mentioned above should serve as guidelines and you are on your own risk by doing them. Also keep in mind although updating firmware through SEUS is covered under warranty terms but altering the CDA using third party software (XS++) will VOID your warranty.
If you’re so unlucky and got your phone bricked, follow the following resurrection steps :

i) Download XS++
ii) Download the P1i Ressurection package here : P1i CCPU
ii) tick smartphone connect
iii) press connect
iv) connect the USB cable while holding C button.
v) go to flash section
vi) load the zip file under smartphone flashing section, DO NOT UNZIP THE FILE.
vii) tick flash CCPU (remember, ONLY TICK CCPU)
viii) Execute and wait it to finish
ix) you should now proceed to turn on the phone and see if it is resurrected