NBTC implemented Type Approval on LTE and 5G NR user equipment. WWAN user equipment support partial band (not full band based on NBTC frequency band) which can cause Thailand WWAN network to operate inefficiently due to incomplete bandwidth.

Main frequencies affected are:

• Band 28

TX/RX Freq  = 703-748/758-803

Freq Plan = NBTC FP 206-2562

Example of products with partial band = Products that support band 28 but with partial frequency such as 718-748/773-803MHz

• Band 41

TX/RX Freq  = 2500-2690/2500-2690

Freq Plan = NBTC FP 207-2562

Example of products with partial band = Products that support band 41 but with partial frequency such as 2535-2655MHz

Below are link of NBTC frequency plan for your references.
NBTC FP 206-2562
https://www.nbtc.go.th/getattachment/222971e9-515b-4be1-b408-36e9dc3fb5c4/%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B2%E0%B8%A8%E0%B9%81%E0%B8%9C%E0%B8%99%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%96%E0%B8%B5%E0%B9%88-700-MHz.PDF.aspx?lang=th-TH&ext=.pdf

NBTC FP 207-2562
http://www.nbtc.go.th/getattachment/fbe5aa2f-b935-438b-bd2a-230611e89d8f/%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B2%E0%B8%A8%E0%B9%81%E0%B8%9C%E0%B8%99%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%96%E0%B8%B5%E0%B9%88-2500.PDF.aspx?lang=th-TH&ext=.pdf