With all roms are the same, i update the firmware with B136, B138, B160 and B162 (stock roms) and already with oxygen, void, CM7 and MIUI roms with custom kernels, full wipe,etc... i sell my Xperia X10 mini for this phone :( it has the potential, overclocks well @ 1.5Ghz but the wifi doesn't work :(