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Message: <blockquote data-quote="charmer" data-source="post: 1940802" data-attributes="member: 226">Firmware upgrade can not relock the nokia device (all Nokia, Samsung, LG, Motorola).but if you have a sony ericsson phone and you have done the patch unlock, you will need to unlock again after OS upgrade/downgrade/reflash.there are too types of unlock for sony ericsson phones (permanent and temp)but nokia phones, once you have enter the unlock codes/ or unlocked by software, it is unlocked permanently. you can upgrade the firmware version to the highest. you must goto the same place where you unlocked the phone for the firmware upgrades as they have this nokia service hardware box (JAF, MT-BOX) to upgrade the software safely. you are runing a gr8 risk if you try to flash it online/alone all the best</blockquote>

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