Before selling your favorite smartphone you need to know something !!! - | Mobile phone price in Bangladesh 2017 | Android Mobile price in BD
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Before selling your favorite smartphone you need to know something !!!

Before selling your favorite smartphone you need to know something !!!

Computer Tips
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If you are thinking to sell your favorite Android smartphone.Before selling your smartphone you need to know something about your security. you need to do something for your safety.
A new Cambridge study has found that user data is retrievable from second-hand Android devices that have been wiped via a factory reset, reported. Such data can be recovered even from handsets protected by full-disk encryption, the researchers said.

Are you planning to junk your smartphone in the second-hand device market for the sake of a new one? Beware as your data can be retrieved from your old phone.
Most Android handsets offer no easily accessible way of deleting user data, including access tokens, messages, images and other content, the study said.
Experts have been airing their concerns for some time now that the phones are extraordinarily difficult to clear of user data.
The study examined 21 second-hand devices running Android versions from five manufacturers that had been wiped using the operating system's built-in factory reset feature.
But the problems also exist with third-party data deletion applications, such as those offered by antivirus vendors, the researchers said.
The team was able to recover data including multimedia files and login credentials from wiped phones, and many of the handsets yielded the master token used to access Google account data, such as Gmail and Google Calendar.
The problem results from multiple issues, including the inherent difficul of fully deleting data from the flash memory used in smartphones, something due to the physical nature of such memory chips, according to the research.
Other issues include vendors' failure to include necessary drivers or failures introduced by their modifications of Android for individual devices.
As a proof-of-concept, the researchers recovered the master token in a device and found that after reboot, it successfully re-synchronised contacts, emails and other data.
The master token, used to access Google accounts, was found to be retrievable in 80% of the devices that had a flawed factory reset mechanism.

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