Why am I unable to get updates on my HTC ONE DUAL SIM 802D?

Sandyuz1987

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Nov 3, 2014
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HTC ONE DUAL SIM 802D help

I have HTC ONE DUAL SIM 802D. It's running Android 4.4.2 with Sense version 6. But I'm unable to get any more updates. Whenever I check for updates in the settings, it just keeps on checking and doesn't even tell that your phone is up to date. When I got the phone it was rooted but bootloader was locked. Now I have unrooted the device, still the same problem persists. Kindly help.