# MC77xx: How to create custom bands

**URL:** <https://forum.sierrawireless.com/t/mc77xx-how-to-create-custom-bands/6144>\
**Category:** MC/EM Series\
**Created:** [February 14, 2013, 4:33pm UTC](https://forum.sierrawireless.com/t/mc77xx-how-to-create-custom-bands/6144 "2013-02-14T16:33:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FAQ\_Poster](https://avatars.discourse-cdn.com/v4/letter/f/f9ae1b/32.png) [@FAQ\_Poster](https://forum.sierrawireless.com/u/FAQ_Poster)\
**Post date:** [February 14, 2013, 4:33pm UTC](https://forum.sierrawireless.com/t/mc77xx-how-to-create-custom-bands/6144/1 "2013-02-14T16:33:43Z")

</div>

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