Quick Pre Requisites:
- Ensure that you have installed the MIUI Custom ROM as it is an MTD based ROM. Please note that if you are on any of the firmwares then you cannot update your device with this firmware.
- Assuming that you are already on the MIUI custom ROM, you need to ensure that you have taken a backup of all your data so as to just ensure that if any data is lost or corrupted, the same can be restored easily. With the help of below mentioned tips, you can easily backup or restore the data.
SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log – Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”
- Disable all the Security Suites, Firewall tools and also the KIES PC Suite as these tools tend to interrupt the process of firmware update. Note that the device is left with the minimum of 60% battery charge so as to ensure that it doesn’t get turned Off in the middle of firmware update.
Special Instructions for Users on Custom ROMs:
If you have installed any Custom ROMs in your phone, then you need to first turn Off your phone to enter into the recovery mode. The recovery mode can be entered by pressing Volume Up Key + OK button, and holding both simultaneously press the Power Button. In recovery mode, select options “Wipe data/factory reset”, “Wipe Cache partition” and after this you need to also select “reboot system” so as to restart the phone.
Note: We will soon come up with an article which will help you in Rooting your Galaxy S on 4.0.3 Firmware.
So, let’s get started to the next page where we will see on what is the procedure to update with this firmware.