Initial steps you can take: If possible, always try to troubleshoot or do a quick check yourself first, such as:
Things you SHOULD NOT DO: Do not carry out any of the following without any advice from the TM UniFi Centre or TM Technicians:
UniFi Service Guide The easy steps on understanding UniFi services.
UniFi Equipments User Manual You may download the user manual for your reference.
Wireless Technology - An Understanding
CPE Warranty