Update troubleshooting

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http://forum.xda-developers.com – OK I try updating my tablet manually, my tanker is in the us problems 1) the SKU required say it needs to be CN_epad-9.x.x.x_2012xxxx. What SKU does this come from? 2) update alert won't appear 3) update fails when it does appear 4) do I really need to factory reset to be able to update to the newest version? Sent from my SPH-D710 using xda app-developers app (HowTos)