I think this mobile is not reliable for all of us and due to very slippery there are much risk to carry it in hand . cancelled my update in middle.so I lost my upgrade to marshmallow.i now cant find it again.plz help me out to get my update again.how can I update it again .Hello sir, all you need to do is update the play store applications. Once you upgrade to marshmellow, the applications will reset and will need update from play store. Everything will be smoothly synchronised without any issues. Send me a message in case this doesnt help.