hi , i have an advent tegra note 7 tablet ( tegranote-P1640). for some strange reason it wont even ask me to update to the lolipop. it has andriod 4.4.2 on it and it says that the system is up to date. but i see alot of guys saying that they received the 5.1 update. i think the tablet is from uk. i see that it has superu on it and i installed a root checker and it said that it was rooted. i was wondering if i could manually upgrade this to 5.1 and whats the process and where to get the rom...
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