- Are the gooapple/goophone roms compatible with other similar phone?
Some phones are compatible, but you need chinese recovery to install are custom roms but not for factory roms.
- How do I stop smart keyboard from force closin in V2.1?
You need to go in root explorer, thant navigate to system/app, then you find smarkeyboard.apk and instal it from there ot the phone.
- How do I ask questions?
You can post them here: http://forum.xda-developers.com/showthread.php?p=23416889#post23416889 but you need to be a member of the xda forum.
- When i'm installing from sd card, i have an error message:signature not found.
It is because you need to have installed the chinese recovery.
- Where is the best place to buy these phones?
Personally, I recommend Android mobile pad as the process time is really fast.