I want to unlock my xt907

Please described your problem a bit, if you want to unlock the Boot-loader of Motorola xt907 RAZR or you want to unlock the SIM.
Here I am giving you both the solution what I found on the Internet:
1. boot-loader unlock SIM Unlock Verizon Wireless Motorola Droid Razr For GSM Use
2. Root and Unlock Root and Unlock Bootloader of Droid Razr XT907 On 4 4 2 KitKat

Ahsan-

Can you provide more details?

Mark
Motorola Support

Turn off Enhanced Roaming Indicator.

Hi Anonymous,

If you forgot the password to access your phone, please follow the steps detailed on this link at the "can't unlock your smartphone?" part
How do protect my device from unauthorized use

If you are not able to unlock the phone after following the steps above please perform an External Reset on the device, if you have doubts on how to do it follow this link: How do reset my device

Regards,
Gaby
Motorola Suport.

Only the Developer Edition can be unlocked.

Mark
Motorola Support

Using unofficial ROMs could cause certain functions of your device not to work as there may not be driver support.

Mark
Motorola Support

You cannot remove the battery on certain Motorola Phones.

Mark
Motorola Support

I have no idea about software.If you want to unlock your Motorola Droid Razr M mobile phone from the network lock,I would suggest you to get an unlock code from http://www.superunlockcodes.com/motorola-droid-razr-m/rs5wp9/ at reasonable price.