According to Verbal information from NBTC,The NBTC Certification head had include changes of type approval for cellular mobile products On 25th February 2020.
The reference standards-NBTC TS 1027-2560.
Frequency bands which required test reports for NBTC Class B approval for WWAN Products:
-GSM 900, 1800
-WCDMA B 1, 3, 5, 8
-LTE B 1, 3, 5, 8, 40 , 41
-LTE LAA/eLAA B46
-5G NR n1, n3, n5, n8, n28, n40, n41, n258
Band 41 is newly added for LTE ( due to opening of 5G NR Band 41 ) all new applications for WWAN products required to include LTE Band 41 result ( if its open ).Frequency bands that required test reports for NBTC Class B approval for WWAN Products:
-GSM 900, 1800
-WCDMA B 1, 3, 5, 8
-LTE B 1, 3, 5,28, 8, 40 , 41
-LTE LAA/eLAA B46
-5G NR n1, n3, n5, n8, n28, n40, n41, n258