As one of Thailand’s leading mobile phone operators with more than 40 million customers countrywide, fast and effective customer service is the key to retaining the customer base. It relies on various types of data such as personal data and usage logs, through numerous channels and devices to analyse and fix issues. The data size constantly grows larger as mobile users always update and change their information until the storage becomes huge and staggering in different departments. It takes weeks to collect information and investigate a customer complaint affecting service quality.