System messages . Mobile Cloud Service? Message Controler System?. My understanding is that this packages implements the communication logic of the Heytap services. It provides a MQTT client (and Firebase Cloud Manager for users outside of China) which frequently talks to heytapmobile.com. You can safely remove this package if you don't have a Heytap account. Runs constantly in the background Pithus analysis: https://beta.pithus.org/report/8920395af63782fca8dfce18715a10ca5a2d8236d525208ea347eff8f738731e
Phones target this application