k608i - How can I restore the firmware?

When I gave my 3 UK branded k608i to a local phone shop to get it unlocked so I can change SIMs whenever I wanted, they put the k600i firmware on it. Since then, phone status reads "Model:k600i".
But I later learned that the k608i too has an unbranded firmware. And I've been trying to install flash drivers (for XS++) for my phone.
As you must know, this phone comes with a weird USB connector that I've never seen on any other SE phone. So maybe the remove SIM, hold C btn thingy doesn't work on this.
If so how can I put the proper k608i firmware on this?
Thanks in advance to a person kind enough to help me out. :)

You need a T28 cable or a sync station to flash your phone.

u can down load at top sony and reflash your phone.

if u have phone model in hand, know your cid of your phone and download in top sony. Down load xs++ and read tutorials on flashing in top sony before flashing, top sony is not responsible damage caused to your phone for your acts.

XS++ as soon as it connects it logs your phone info.

You will probably need your original gdfs info too

Quote:

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Originally Posted by justme

You need a T28 cable or a sync station to flash your phone.

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The USB cable included function too!! Instal flash driver, plug cable to usb pc port, select usb port and, for detecting, hold "C" and press ON/OFF button.

Quote:

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Originally Posted by starjet905

But I later learned that the k608i too has an unbranded firmware. If so how can I put the proper k608i firmware on this?

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The k608i firmware is FS and CP language limitated, not for all user.