Hello, I just registered to help you! I have EXACTLY the same phone's build. Try these steps and it will work, it also doesn't lock anything as far as your operator is concerned:
just put /dload1/update.app on the SDcard as /dload/update.app and do it normally by accessing memory options and selecting update from sd card... you could also start phone with both volume buttons and the on/off button pressed simultaneously...works both ways...
Since this forum has rules that I can't include the link in my very first post, I'll post another one shortly after and I hope moderators can then merge them...
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