On 132.8 recently had what sounded like DTMF tones, someone using equipment like a radio phone patch. Brought it to the attention of controller, said telecom people had been informed for some time about this problem.
KL has some of the best controllers about when weather avoidance is required.
Sometimes a little trigger happy, not letting pilots to finish off reading back a clearance or instruction, blocking the frequency. Some of the speed reductions requested are unrealistic for arrival into WMKK.
As previously mentioned, VHF volmet stations on high terrain on to the north and south would help.