So far, I am quite please with the performance of TPG network when it is used above ground. As they have indicated, coverage is still not ready for MRT, tunnels or indoor basement. Things should improve over time.
TPG should also have a better SIM allocation scheme. Till today, they still allow a person to register 4 TPG trial SIMs. This has resulted in mass traffic swaming their online registration system and long queues at collection centres. There is also not much technical support as to when VoLTE can work on their handsets.
Update 26/1/2019 : It seems that Band 40 is becoming more common in public areas. The speed of this TDD Band 40 2300 MHz can easily reach 100 Mbps as compared to FDD Band 8 900MHz
Update 29/9/2019 : iPhone with ios 13.1.1 can make voice calls over LTE (VoLTE)
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