naku trabaho ko to dati lol. i would divert my phone to another simcard na wala sa phone in short dead and cannot be reached. pero naka on pa rin yun main line ko so nakaka tanggap lang ako ng text messages. yah i think theres like a split second na parang magjujump yun pag ring. also agree with sir boybi na iba ang ringing sound ng landline sa mobile altho yun ringing sound ng landline at sun cellular iisa :D