You have reached the support for TPG Australian consumers. TPG Australia & TPG Singapore are 2 separate entities, kindly send an email to Singapore Mobile Team at firstname.lastname@example.org or visit their Facebook Page at https://www.facebook.com/TPG-Singapore-785533401811953 so they can further assist you with your concern.
Is TCP port 44158 open TPG SIM Only plan in Singapore? which is required in some application? Does anyone know?