I have handled quite a few of these older devices over the years, and I would suggest being very methodical with the process. I once rushed a reset on my own unit and ended up in a boot loop because I didn't wait for the battery to be sufficiently charged. Make sure you have at least 50% power before starting. First, you must ensure the device is totally powered down. I find it best to actually pull the battery for a few seconds to be certain. To trigger the menu, hold the Volume Up and Power buttons simultaneously. You must keep them held down until the recovery environment loads; don't release them just because the logo appears. I learned that the hard way. Once inside, use the volume keys to find the wipe data option. Be careful tho, as this is permanent. It's usually the only way to fix a deep freeze, but I always warn people to double-check for an SD card before they start so they don't lose external files too.

To perform a hard reset on your Huawei Ascend G300, follow these steps:

1. Power Off: Ensure the device is completely turned off.

2. Enter Recovery Mode: Press and hold the Volume Up button, the Call button, and the Power button simultaneously. Continue holding until the Huawei logo appears, then release all buttons.

3. Navigate Recovery Menu: Use the Volume Up and Volume Down buttons to navigate through the options.

4. Select 'Wipe Data/Factory Reset': Highlight this option and press the Call button to select it.

5. Confirm Reset: When prompted, confirm the action to proceed with the factory reset.

6. Reboot Device: After the reset is complete, select 'Reboot system now' to restart your phone.

Please note that performing a factory reset will erase all data on your device. Ensure you have backed up any important information before proceeding.