General

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AT!BAND=?
Index, Name, GW Band Mask L Band Mask L ext Band Mask
00, Auto, 0002000004C00000 000001A0080800C5 0000000000000000
01, WCDMA All, 0002000004C00000 0000000000000000 0000000000000000
02, LTE All, 0000000000000000 000001A0080800C5 0000000000000000

0000010000000000 - B41
0000008000000000 - B40
0000002000000000 - B38
0000000008000000 - B28
0000000000080000 - B20
0000000000000080 - B8
0000000000000040 - B7
0000000000000004 - B3
0000000000000001 - B1
0002000000000000 - B8 (900)
0000000004000000 - B5 (850)
0000000000800000 - B2 (1900)
0000000000400000 - B1 (2100)

OK

Specification / Documentation

...

https://community.netgear.com/t5/Mobile-Routers-Hotspots-Modems/Nighthawk-M1-MR1100-100EUS-How-to-enable-Bands-for-Canada/m-p/1708095#M8435

Band locking

https://www.lteforum.at/mobilfunk/das-erste-1gbit-lte-netgear-mr1100-nighthawk-m1.6908/seite-3.html

https://forum.sierrawireless.com/t/mc77xx-how-to-create-custom-bands/6144

1. Obtaining Band Masks

The following procedure can be used to obtain available band basks:
AT!ENTERCND=“OEM password”
AT!BAND=?

This will display the existing selections and the band masks for the bands the device supports.
Using MC7710, for example:

00, All bands, 0002000000600380 00000000000800C5
01, Europe 3G, 0002000000400000 0000000000000000
03, Europe 2G, 0000000000000380 0000000000000000
04, North America 2G, 0000000000200000 0000000000000000
05, GSM ALL, 0000000000200380 0000000000000000
06, Europe, 0002000000400380 00000000000800C5
07, North America, 0000000000200000 0000000000000040
08, WCDMA ALL, 0002000000400000 0000000000000000
09, LTE ALL, 0000000000000000 00000000000800C5

                                                 			     0000000000080000 - B20
                                                 			     0000000000000080 - B8
                                                			     0000000000000040 - B7
                                                 			     0000000000000004 - B3
                                                 			     0000000000000001 - B1
                                		0002000000000000 - B8  (900)
                                		0000000000400000 - B1 (2100)
                                		0000000000200000 -     G1900
                                		0000000000000200 -     G900P
                                		0000000000000100 -     G900E
                                		0000000000000080 -     G1800

Blue = LTE bands
Green = GSM/WCDMA bands

1. Creating a new Band Selection

To create a new band selection, you can combine band masks using a bitwise OR to choose multiple bands.
AT!BAND=,<”name”>,GSM/WCDMA band mask, LTE band mask.

Examples:
1.To create LTE B3 selection execute
AT!BAND=10,”LTE B3”,0,4
2.To create LTE B1/B3/B7 Selection
AT!BAND=10, “LTE B1/B3/B7”,0,45

1. Deleting Newly Created Band Selection

To delete newly created band selection, execute AT!BAND=10,””,0,0

1. Reverting Back to Default Band Selection

To revert back to default band selections, execute AT!BANDDEF

https://ltehacks.com/viewtopic.php?t=33

https://ltehacks.com/viewtopic.php?f=16&t=33&start=20

https://whirlpool.net.au/wiki/sierra_advanced

AT!ENTERCND="fallow" Try this one.AT!ENTERCND="fallow" AT