[Q] New replacement phone, cannot get into recovery

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http://forum.xda-developers.com – Just got a replacement phone from Sprint and have activated it. Wanted to do a simple HTCDev.com unlock for the ability to do a few things that require root.. From being powered off, I hold down the Down Volume and them press and hold the Power button but that doesn't work... The three icons (buttonless buttons) flash a number of times but no matter how long I hold down those two buttons, the phone won't boot into the bootloader. And YES, FASTBOOT is unchecked .... Any ideas? I've rooted a number of phones and it's usually the 'hold down the down volume + power' until it boots into the (HowTos)