https://blog.csdn.net/sinat_36184075/article/details/80572896
1、QPST从设备重backup出静态.qcn
2、QRCT将.qcn转换生成.xml配置文件
3、从.xml文件中检查/nv/item_files/modem/mmode/lte_bandpref的配置值和格式
标准格式：
213,0,8,0,160,1,0,0
6828 == 6829 == 1786958649567
十进制： 1786958649567
十六进制： 1A00F0918DF
补全高位5个0
00 00 01 A0 0F 09 18 DF
0 1 2 3 4 5 6 7
倒置，并用逗号隔开：
223,24,9,15,160,1,0,0
------------------------------------------------------------------------------------
NV 65633 /nv/item_files/modem/mmode/lte_bandpref
HH41CM band [1 3 5 7 8 20 26 28 38 40 41]id card
device:
NV 6828 == 1786706919637,0
二进制：11010000000000000000010000000000011010101
NV 65633 == 213,0,8,0,160,1,0,0
HH41NH band [1 2 3 4 5 7 8 12 13 17 20 28]id card
device:
NV 6828 == 168368351,0
二进制：1010000010010001100011011111
NV 65633 == 223,24,9,10,0,0,0,0
------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
NV 65633 /nv/item_files/modem/mmode/lte_bandpref
HH40generic
device:
NV 65633 == 1786958649567
0x 1 A0 0F 09 18 DF
二进制：1000000010010001000011001111
NV 65633 == 223,24,9,15,160,1,0,0