Here list the tested info collected from Dragino Customer for NB IoT products. More compatible can see module vendor link:

Country/AreaOperatorBandNB Module BC95-GNB Module BG96Notice
ChinaChina TelecomB5 850MhzYesYes 
ChinaChina UnicomB8 900MhzYesYes 
ChinaChina MobileB8 900MhzYesYes 
China HongKongChina MobileB3 1800MhzYesYes 
SloveniaA1 MobileB3 1800MhzYes  
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