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Upgrade firmware B1-A71 from China

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cartofla
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Default Upgrade firmware B1-A71 from China

Hello everybody.

I bought B1-A71 in China. The tablet's firmware is Acer_AV051_B1-A71_RV04RC05_GC_GEN1 with all Google service disabled.

I donīt want to root it. I only need to upgrade to Acer_AV051_B1-A71_RV05RC05_WW_GEN1

There is no upgrade option in settings. I tried to manually update it but always got this error:
assert failed: getprop("ro.product.name") == "B1-A71_ww_gen1"

Any idea to upgrade these tablet?

Thanks.
 
ch1na
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Location: jiangxi nanchang
http://forum.xda-developers.com/show....php?t=2240029.
you see it
 
cartofla
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Quote:
Originally Posted by ch1na View Post
Thank you.
But I donīt know wich system.img.gz download.
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