The LoRaWAN regional parameters v1.0 (July 2016) added the support for AS923MHz ISM Bands for mostly south east Asian countries. It indicates channel frequencies used in Singapore are 920-925 MHz.
Now it seems that majority of the LoRa devices in Singapore are not exactly using this channel plan, Loriot for instance uses the same frequency mapping as EU868MHz but shifted to 915MHz.
I was wondering what frequencies constitute the ISM band in Singapore and what are the regulations for using these bands since it seems not many nodes/gateways are operating according to the LoRaWAN AS923MHz but apparently it is not strictly illegal? I have had a look at IMDA (Info-comm media development authority) website but it wasn't massively helpful, perhaps you could help me out?
Many Many Thanks,