HTC One locked, I know email but forget password, can I take it to an 02 shop

[Anonymous]

Hi,

So, I've locked myself out of my HTC one. I know the email address associated with it (gmail) but my main account is yahoo. Therefore I can remember the password. I've reset the gmail password but the phone is not connected to the internet so it doesn't pick up the change. Therefore, can I bring it to my local O2 shop so they can unlock. It under contract.

Thanks in advance for any replies!

[MI5]

You will need to factory reset it and start over.
Press and hold both Volume down button as well as power button until the screen goes completely black.
Once it is black release the power button only. Do not release the volume down button.
You will be booted into the bootloader mode.
From here you can select recovery mode by navigating using the volume up or down. Use power button to make a selection.

[MI5]

Once you log in with your Google account and new password it should re download your apps and the HTC backup if you had it enabled.

[Anonymous]

Great, this work but I would like to add that I got a screen with a red exclamation mark. To get around this and select options, once you enter stock recovery (red mark) simultaneously and briefly press POWER + VOL UP + VOL DOWN to get to the menu.

Anyway thanks and here's the kudos

[MI5]

Thanks for the update and tip