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Old 09-13-2016, 08:26 PM   #42 (permalink)
tsac
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Join Date: Mar 2005
Location: Others run out when we run in
Model: Z10
OS: Cheerios
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Default Re: Latest OS: 8520 5.0.0.1728/5.0.0.1067 (All Languages)

The 8520 is fairly old but you can try doing a search on the internet for updates and information on the highest available. there are also some YouTube links showing how to update.

You should do a full backup before doing anything.
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