I have noted 4G reception has been poor at 285 Jalan Ahmad Ibrahim inside the building for 2 years. There is still 3G or HSPA+ but not 4G reception. Singtel 4G signal has been better with the installation of antenna. Is Starhub able to provide something similiar?
Have you tried to restart your device or toggle to airplane mode to refresh the network connection? Does it helps? - Josephine
Noted on your concerns. Please send me a private massage with your StarHub Account number, NRIC/FIN, contact number and email address so that I can look into your feedback and assist you further. Thank you.- Josephine