Hello everyone! I have enough golden points on Chinabuye to get one mobile phone for $90 or less for free. Can you suggest me a decent mobile phone from there? For now I'm thinking of ordering one of these two http://www.chinabuye.com/fine-and-high-quality-gt-i9100-quad-band-dual-sim-dual-standby-4-3-capacitive-touch-screen-android-2-3-wifi-bluetooth-gps-mobile-phone-black-is-a-multi-functional-and-fashionable-cell-phone-6 and http://www.chinabuye.com/i68-4g-quad-band-dual-sim-dual-standby-wifi-java-phone And second question: Can I upgrade the Android OS on Chinese phone? Thank you all in advance!