Why isn't the HTC one OTA update working?

A

AC Question

HTC one OTA update is not working. With a red Triangle

hello. i bought a HTC one M7 from ebay and dont know whether it is rooted or have some custom rom or to which carrier it may be locked or anything. Now the phone is working fine with different sim. My problem is that the phone is not updating OTA. It downloads the update and when it tries to install a red triangle stops it. Please help. I am new to android. and i want the latest update. Any help is greatly appreciated. Thanks in advance. Please help.
 

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Re: HTC one OTA update is not working. With a red Triangle

Welcome to Android Central! Install and run Root Checker to see if the phone is rooted. If it is, then it might be running a custom ROM that is causing problems with the update installation.