Some handset provider give an update to their customer with the latest software. Just do some few click, downloading the update, and finally install it. But, not all handset provider giving update to their users.
Even worst, handset provider it’s also don’t provide any driver for their handset hardware. Meanwhile, upgrading into the latest version sometimes mean using new kernel.
If your vendor didn’t give firmware driver for the latest kernel, that mean your handset has been abandoned. It’s because, your hardware can’t function well (or even not work) in new kernel.
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