GC 400 have good features but it has the same problem like other chinese mobile, that it always hangs as well as automatically switch off after a light jerk. The battery back up is very poor you can`t talk continously more than 2 hours. so my suggestions is to go for Samsung mobile rather than it for CDMA + GSM
low battery back up
I think the phone is excellent in the price given. I bought in 4k ..I am happy to use this phone........
What a phone....Excellent
No software you can download in that