Manually updating HTC ONE M9

Hello @mamovil92,

What a fantastic question! I will be more than happy to answer it!

Once a phone has been unlocked from our network, it will remain unlocked.  Even if you manually update the software!  Please feel free to come back with any other questions or concerns.

Thank you for reaching out to the Community Forums! Have a marvelous day!

Katie, AT&T Community Specialist

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@mamovil92 wrote:
Hello, I have an unlocked HTC M9, it is currently sim unlocked. If I update it manually using the 2.2 GB file will my phone still be sim unlocked or will it relock and only accept AT&T sim cards? Thanks in advance

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@mamovil92

what update file are you using?