Lumia 640, non-insider, build 14393.321 won't install

I have an AT&T (unlocked) lumia 640. I've been notified about an update since last week. Successfully downloaded (many times). The phone, however, won't prompt me to install it after the download is complete. it just says: downloading uptade 100% for more than two hours. is anyone else having this issue?

I am right now on build 10586.107

Thanks all.

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