Huawei Ascend Y300 U8833 update exception eMMC error
Sorry I have bad news if you have this issue.
If your apps are displaying error messages, and you cannot hard reset or update your Huawei Y300 phone using this Huawei y300 firmware update tutorial and you still getting "update exception eMMC error" and getting "Update exception EMMC is readonly, you can't update your system" error message while trying to use SD card update, this is probably because your eMMC (embedded MultiMediaCard) chip is damaged, faulty, so you need to replace it. Take it to your local repair center or if the rapair cost is too much than you should buy a new phone. Sorry!
Symptom: Damage of the eMMC chip cause abnormal operation, "Update exception EMMC is readonly, you can't update your system" error message displayed on the screen while trying to update the Huawei Y300 Android phone.
Professional repair is possible with the exchange of the faulty eMMC chip, it needs to be replaced.
Model: Huawei Y300-0100 U8833-1