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Locked vs. Unlocked for OS Updates

I received an AT&T variant of the One M9 directly from HTC.  Since it has the AT&T logo on the back and lists AT&T as the carrier in the "About Phone" section of settings menu, I assume that to mean it's "locked".   I noticed that HTC One M8 and M9 unlocked devices will receive Android 6.0 before th

Questions

 • Android

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HTC One M9 no longer receiving mms

Help! Suddenly my phone will not receive group messages or pictures. I can still send and everything else woks. All settings are correct. Is this something from an update? What setting can I change or uninstall to make this work again? Not getting group mms messages costs me work. Help! Thanks in ad

Questions

 • Android

866

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AT&T released a software update for the HTC One M9 (OPJA110) on July 15, 2015.

HTC One M9 users,    AT&T released Android Version 5.1 for OTA download today!To download:Drag down the notification bar with two fingers, and then tap Settings > General.Tap About Phone > AT&T software update.Tap Check for updates.Tap Update Now.Follow the on-screen instructions.Please note: Device

Questions

 • Android

477

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Manually updating HTC ONE M9

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

Questions

 • Phone & Device Upgrades

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