I have a verizon one max HBOOT 2.49 unlocked bootloader by using Firewater http://firewater-soff.com/
After you read what it is for on the homepage click on the Instructions/Download Tab and of the 3 methods given, use the "Instructions (WeakSauce method - some m8 models and maybe others)
Basically you need to download the app called Weaksauce it is in the steps for the method above and at the link -->http://forum.xda-developers.com/show....php?t=2699089
When you install the app, it will give you root. install SuperSu from the market and begin the process of Firewater.
1. When you boot your device make sure weaksauce roots your device before you being to use firewater (you can download the Root Checker app from the market to verify that you have root before you start)
2. Download firewater using Internet Explorer
3. Follow the instructions carefully from both weaksauce and firewater