Kalau tombol jenis bulat nak lock tekan button tu, gi carik cd punya plastic cover tu, selit celah2 pintu n dinding dekat area lock dia kasi masuk lebih kurang separuh, then tarik ke bawah
Other type i dunno, probably you can try kicking it if really urgent need to get inside

Another way, pusing tombol tu sekuat hati sampai dia unscrew,pusing3 lagi nanti dia unlock
Direction clockwise or anti clockwise tak ingat