Upgrade Firmware

• Touch interface:It is the first recovery to offer a complete touch driven interface which makes navigation much easier and later cwm also had touch interface.
• Individual Backups: Creating a completely backup is a must for any flasher but this occupies a lot of portion of your internal or external storage.Twrp will let you to backup individual portions of rom, this saves lot of space on your android device.This feature comes handy when you are flashing kernels.You can backup boot img alone if you want and can restore it when flashing kernel fails.
• Advanced wipe:There are two options for wiping your device partitions one is wipe and other is advanced wipe.If you choose just wipe option it factory resets while advance wipe option will allow you to choose what to wipe and what not.
• Theme Engine: This is one of the best feature and is only available in Twrp only.Since ui of twrp is xml based you can customize its ui with already available themes or you can create your own theme if you can.
• Multi rom:As the name says you can boot more than two roms on your device and is exclusive to twrp only as of now.This feature may not be available from official twrp team and booting more than one rom requires a modified kernel by your rom developer.

#1: Unlock bootloader of htc one max

• Download and install htc drivers on your computer if you don,t have.
• Now power off the device completely and wait for few seconds to confirm that it is completely off.
• Hold volume down and power button at same time for few seconds.When you see hboot release buttons.Using volume down for navigation select "fastboot" and click on power button to reboot into fastboot.
• Once you are in fastboot mode connect it to computer through usb cable and if you notice any driver installation process let it complete first.
• Download  fastboot on our laptop or Pc and install it.You can install it any where but choose location as c: which is default location.
• open the fastboot folder which is located in "c:\programming files".Right click on empty space by holding shift and you see an option "open cmd here".
• If you don't find this option then press windows and R buttons at same time ,Run pops up and type cmd to open command prompt.
• Now go to fastboot folder and copy the location of it which you can see in address bar of folder.
• In command prompt type the command "Cd location of fastboot folder" and press enter.You will notice that fastboot appears in command line.To paste location right click on empty space in cmd and several pops up.Select paste.
• One you press enter you have to notics minimal adb and fastboot in command line instead of c or some thing.
• Once you are in fastboot window type "fastboot devices" and press enter.If your device is detected you will get a serial number in list of  devices attached.If not uninstall drivers and install them again.
• Now type the command "fastboot oem get_identifier_token" and hit enter.You will get a serial key.Copy that key.
• Now open htcdev.com and register with a valid email id.
• One you sign up there.Log in to your account and you will find three options if you explore.
• Click on unlock bootloader option and select your other supported devices.
• Proceed all other steps as mentioned and you are are asked to submit Submit your key there.
• You will receive a mail from Htc which includes a unlock_code.bin file. Download it and move it to fastboot folder which is located in programming files.
• Now type the command "fastboot flash unlocktoken unlock_code.bin" and hit enter.Check your device ,you will notice a notification on one max to confirm unlocking bootloader. Click on yes.This will unlock bootloder and also erases all data of your Htc one max.
• You have a unlocked bootloader device which is ready to accept a recovery to be flashed.