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I successfully built the system.img and userdata.img from the source. Then, I used the following commands to flash my cellphone:

fastboot flash userdata data.img 
fastboot flash system system.img 
fastboot flash boot boot.img 
fastboot reboot

But when the cellphone reboots, it fails to come to the desktop, and also fails to connect to my Ubuntu 11.10 in the fastboot mode. My cellphone also seems to come to fastboot mode, because it can stop at my cellphone manufactor's logo, as it did beforehand. But if I connect it to my PC, and I use the fastboot devices, it prompts nothing and seems to be looping in the terminal.

Any ideas?

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Did you purge cache/Dalvik/data? At least the first two one should clear when installing a new ROM (which is what you did). If you no longer can go to your recovery mode for this, a factory reset might still be able to solve it. – Izzy Dec 31 '12 at 7:12
@Izzy I can go to recovery mode now.But just the rom i made does not suits for my machine – kaiwii ho Dec 31 '12 at 9:48
In that case, you might wish to flash a compatible ROM. Check Where can I find stock or custom ROMs for my Android device? for available sources. – Izzy Dec 31 '12 at 10:51
@Izzy,actually,my problem is how to build the comaptible ROM. – kaiwii ho Jan 2 at 14:16
That question is off-topic here (see our FAQ). This is about end users' problems with Android, not from a developer's perspective. – Izzy Jan 2 at 15:10
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closed as off topic by Izzy, Bryan Denny♦ Jan 2 at 15:58

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