Originally Posted by syscon29
YES for SI number but i m use flashtool new verzion! maybe need to download old verzion? what firmware to download and update to back this SI number???
You have to go back to 1278-5954 customization number.
In flashtool click:
1. Devices->Check updates
2. In device selector double click C69XX
3. Than choose C6903 tab.
4. Scroll down to 1278-5954 id.
5. Double click it to check for latest firmware.
6. Double click it again to download it.
P.S. You need to use version 0.9.18.1 at least.