If you manually flash the same firmware as you have now, EMA2, then factory reset you won't break anything, but should fix OTA.
OTA will then update to the latest firmware, which is when you will find out if your phone has been fixed. There is no way to tell other than try it.
Search and read about efs v2, it changes a lot of things including sim lock, imei and serial number validation. If any of these things have been repaired then efs v2 will break your network connection.
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Note: This quote doesn't automatically apply to everyone, decide for yourself if it might apply to you.
Originally Posted by justruss
What has this place become?
It's essentially a few people graciously answering the same repeating of immature, lazy, demanding questions from the masses.
Nobody searches. Nobody reads the first posts or titles of threads. Nobody even looks at posts a couple above their own.