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The software which is shown in your mobile is from your carrier... but carrier are too slow to deliver the update as soon as they should.... BlackBerry officially has launched the 10.1.0.4181 maintenance release for all z10 users.... but still many carriers are too slow to deliver this update to their customers.... to make sure all should have this update BlackBerry has also given autoloader... by which you can simply download autoloader and manually update the mobile.... better is you should go through the link I have given to you... good luck..... my o's is right now 10.1.0.4181