My Lumia 1520 is still on OS version 8.10.14219.341. Not getting updated.

[WPCentral Question]

As on Jan 18 2016, my phone still being on OS version 8.10.14219.341 and 02061.00066.14253.40004. I see that the latest OS version for Lumia 1520 8.10.14234.375 and firmware is 2540.19.15053.26006. But when I do "check for updates", I get the message that my phone is up-to-date. My phone manufacturer is*RM-937_apac_hong_kong_222. Is there any way to get the latest update and any reason why my phone says it is up-to-date?