How to pronounce 電訊 in Cantonese (5 out of 6):

PCCW 旗下嘅 香港電訊 HKT
HKT, a Hong Kong telecommunications company owned by PCCW.

Cantonese Sentence Breakdown

旗下 kei4 haa6
under (the banner)
koi3
indignant
generous
to sigh (with emotion)
香港 hoeng1 gong2
Hong Kong
電訊 din6 seon3
telecommunications