This paper provides an overview of the phonological features of Liangmai, a Tibeto-Burman language spoken in Northeast India. It highlights some important features of Liangmai phonology from earlier reports and serves as an update on the study of Liangmai sound system. The phoneme inventory, syllable structure, some phonological and morphophonological features, and the structure of Liangmai tones are presented. In the beginning, the paper presents various linguistic studies carried on Liangmai so far and a brief discussion is presented on the dialectal variation and its linguistic grouping. There are twenty consonant phonemes, six vowel phonemes, nine diphthongs with four contrastive levels of tone at the prosodic level. With or without coda, the place of a nucleus is occupied by a vowel and also by a syllabic nasal that often sits on the first syllable of a disyllable. The present study will be hopefully an insight for those who are studying on the sound systems of other Northeast Indian languages. Like many other community members in Northeast India, the Liangmais are struggling for systematic writing system to represent their language in written form, and the present study will be a supplement to the Liangmai orthography preparation.