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trying to manually update to 2.3.3 and get an error

i have not rooted or flashed anything phone is 2-3 days old i get the zip and it gives me an error this phone is completly stock this will probably be a quick problems for you guys thanks
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i did it turns out i was using the 20mb file instead of the full one that is 89mb or something like that

[Q] How to fix installing application on device?

When I select application to install on device then shown as below!
But I cannot click "Install".
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Note: I just update to use AlBa_XXLRG_Full_Aroma_v2. After finish updated still can use!!!

I found my fault alread!!! This situation occured after I installed com.vito.lux v0.64 from mobilism. After uninstall this app then everything back to normal!!!

I need help with my tablet

My tablet is stuck at ANDROID logo. The model of the tablet is QC-7BHD with Rockchip (BND-RK3126-D86-BT A1.0) . I downloaded this ROM rk3126-quadcore-fq-088ka-1024x600-7inch-android4.4-20170104-test.ok.rar from here (i uploaded a picture because i can't provide links) . Is this safe to flash ? Will it fix the issue ?
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Need help with sideloading error

I keep getting an "Cannot read coral" update that released today. Been sideloading software updates for over 6 years and this is the first time I have ran into this. Any help is greatly appreciated!
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Duplicate of https://forum.xda-developers.com/t/need-help-with-sideloading-error.4289007/
Thread closed

Flashing Firmware without wiping my Pixel 3

Hello all,
if I only want to update the firmware without resetting the smartphone, is it enough to flash the current bootloader and the current radio image via fastboot or do I have to consider anything else?
Many thanks in advance!
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