hi all, have a quick question if anyone could help out please. For some reason my rear speaker has gone quiet and sounds a bit tinny , you can still hear the phone ringing but even on full volume its just no where near as loud as it should be , i was thinking of resetting the phone though web os doctor just to see if anything changes, but my question regarding that is, i have unlocked my phone to any network and was wondering if this would lock my phone again to its original o2 uk network meaning i would have to pay to unlock the phone again. It is a pre plus if that makes any difference.

Thanks in advance for any help received,