QUOTE(UNDERGROUND @ May 31 2014, 02:39 PM)
My friend bought a Mi3 a few days ago from a local phone stall at merely RM800.
I believed it's an imitation, so I asked him to send me printscreen of Antutu.
Antutu was showing 1920x1080
but
Antutu X was showing 1280x720
which is very weird
Antutu - 1920*1080
Antutu X - 1280x720
Anybody had any idea?

Very unfortunate, my friend also ended up bought a fake 99% imitation back from China.
Few way to check actually, install CPU-z as it will verify the actual CPU used inside. As my friend's case, Antutu shown MSM8974 but CPU-z detected as MTK6582.
Other ways is to check the system itself. Switch off the phone, press Vol- & Power button simultaneously to check whether it reboot to Xiaomi's Fastboot mode. Or press Vol+ & Power button to reboot to Xiaomi's Recovery mode.
Sadly, my friends unit failed all steps above and ya...GG.