Robje007 you only get the pink screen if their is no update found below is how to use force update
1. Unzip the downloaded file
2. Place the Update.app inside a folder named "dload" on your SD card root directory
3. Power off and turn on your Ascend Y300 holding volume down + volume up + power button
This was taken from Huawei upgrade guide
Step 1. A MICRO SD card of 2G or more should be available. The MICRO SD card
made by Sandisk, Kingstone, or Kingmax is recommended.
Step 2. Format the MICRO SD card (This operation is optional).
Step 3. Copy the Software: main package to a directory named dload.
Step 4. Copy the entire dload folder (with UPDATE.APP in it) to the root directory of
the MICRO SD card.
Step 5. Make sure your handset is power off. Insert the MICRO SD card into the
handset. Press the VOLUME UP and VOLUME DOWN key, and then press the
POWER key to power on the phone and enter the Software Upgrade Mode.
Step 6. When the progress bar stop, the phone will restart, if not , you need to
remove the battery manually.
Step 7. Copy the Software:vendor package to a directory named dload. Then
Execute Step 4 – Step6 repeatedly.
If want to install a custom or repack Rom for the phone Then
Press vol up + power to boot into recovery and install the Rom from their. (Keep pressing the buttons until the phone boots into recovery)
If you want to boot into sideloader and use adb to push a Rom then
Press vol down + power if the Hauwei logo stays on the screen then you are in sideloader mode keep pressing the keys for at least 10 to 15 seconds.
Hope this is of help to you