Oneplus update

[fla82685]

I got the lollipop update via OTA and downloaded the file. After the downloaded my device didn't update. It just stayed the same. It works fine and nothing is wrong but it's still on Kitkat. When I power cycled it and did a factory reset it did nothing. I am stuck on kit at and have no help. I go to setting to check for an update and nothing happens . Someone please help.

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