Step 1. http://androidforums.com/huawei-soni...650-sonic.html
Download and unzip the "Drivers Huawei (adb drivers)" to your desktop and install the drivers. Also download and unzip the "Custom CM Recovery" to your desktop as you will need it later.
Step 2. http://forum.xda-developers.com/show....php?t=1321582
Create a folder named DooMLoRD-v4 on your desktop and Download DooMLoRD_v4_ROOT-zergRush-busybox-su.zip and unzip it to that folder.
Put your phone into USB debugging mode and run the "runme" batch file in the DooMLoRD-v4 folder on your desktop. When done your phone should be rooted.
Step 3. Open the Custom CM Recovery folder and run the "Instalador" batch file
you now should have a rooted AT&T Fusion with ClockworkMod Recovery installed on it.
Step 4. http://androidforums.com/huawei-soni...650-sonic.html
Scroll down and you will find two custom roms that you can download and install on your phone with CM Recovery. Before you install open up the "system" folder and open the build.prop file in notepad once opened go to edit and in the drop down you should see a replace option. Replace "u8650" with "u8652" so that in your info your phone will have the right model number and save it.