I need to hard reset my uscellulars Huawei m866

First method:
1.At the very beginning hold down the Power key in order to switch off the cell phone.

2. HardReset.info: Then hold and press the Volume Up + Power button for a couple of seconds

3. You can release held keys when the phone's logo appears on the screen.

4. Select using Volume buttons option "wipe data/factory reset", and confirm that with Power rocker.

5. In the next step choose "yes" from the menu, and accept it with Power key.

6. Now choose option "reboot system now" by using Power button.

7. HardReset.info: Success! The hard reset has just been performed.

Link:
https://www.hardreset.info/devices/huawei/huawei-m886-mercury/hardreset/first-method/

Answer above sounds like a solution