well i flashed my K750 with CHINA_MAIN and APAC_FS with the firmware R1CA021, after successful flashed i unplug and on my phone, but when it said pls insert correct sim card, well i found that an application (Remove SIM-lock patch generator) and i tried it. well this time it works for me, i can login in to my phone but the problem now is i can't find the network. so what's the problem ? i'm from malaysia.