It was rolled out, worldwide, to all Oneplus 3 and 3T stock OxygenOS users, last Tuesday, 22nd August.
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<i>Improvements:</i>
<br>
<ul>
<li><i>Enhanced system fluidity</i></li>
<li><i>Battery optimizations</i></li>
<li><i>Android security patch updated to August</i></li>
</ul>
<i>Bug fixes:</i>
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<ul>
<li><i>Sound channel error while recording videos</i></li>
<li><i>Call is routed to speaker accidently by some 3rd party apps</i></li>
<li><i>Rendering issue in Indian Kannada language</i></li>
<li><i>App locker issue caused by some 3rd party apps</i></li>
<li><i>As per Google, Hangouts will be removed if you have never updated it on Play Store. To keep Hangouts, please update it prior to the upgrade'</i></li>
</ul>
<i><a href='
https://forums.oneplus.net/threads/oxygenos-4-1-7-ota-for-oneplus-3-3t.609756/' target='_blank' class='externalLink' rel='nofollow'>Source</a></i>