Sorry if this is a noobie question. Can anyone help or give advice on how to downgrade and unlock Samsung Galaxy S3 on the UK Orange. What I want to do is downgrade then unlock and if possible after that install the Samsung custom rom and remove all the Orange branding and apps. Ive tried unlocking the phone via IMEI on websites and ebay but haven't had any luck so far have been told they are unable to do it.
Here are all details of the phone I can find and are listed below
Its currently on Android 4.3