# QMI SDK Band 66 bitmask value **URL:** \ **Category:** MC/EM Series\ **Created:** [May 6, 2020, 2:38pm UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245 "2020-05-06T14:38:35Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mahtab.sarwar](https://avatars.discourse-cdn.com/v4/letter/m/7993a0/32.png) [@mahtab.sarwar](https://forum.sierrawireless.com/u/mahtab.sarwar)\ **Post date:** [May 6, 2020, 2:38pm UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245/1 "2020-05-06T14:38:35Z")
Hi Guys, The Linux QMI SDK supports setting bitmaks for extended LTE bands, but the values in the LTE extended bitmask aren’t simple mappings to the band designation. For example, while bit 0 is given in the documentation as E-UTRA Operating Band 1, and bit 1 -\> Band 2, bit 60 is given as E-UTRA operating band 125. The one I’m having a problem with is Band 66, I have no idea where in the extended bitmask Band 66 is located, so I can’t turn Band 66 on or off with the QMI SDK. Anyone know its’ position ? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [May 7, 2020, 2:17am UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245/2 "2020-05-07T02:17:17Z")
which module are you using? Seems you are right, I checked api\dms\inc\qaGobiApiDms.h, I cannot see LTE EUTRAN Band 66 for the band capability. Maybe you can use AT command to check. ---
**Author:** ![mahtab.sarwar](https://avatars.discourse-cdn.com/v4/letter/m/7993a0/32.png) [@mahtab.sarwar](https://forum.sierrawireless.com/u/mahtab.sarwar)\ **Post date:** [May 7, 2020, 8:47am UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245/3 "2020-05-07T08:47:44Z")
I’m using an EM7565. Using AT!BAND is fine, no errors, the state of band 66 is displayed and it can be switched on or off without problems. The **SLQSSetSysSelectionPrefExt** api call has a field **lteBandPrefExt** , which seems like a straight bit mask, but assuming band 66 is bit 66 there it still doesn’t work. Actually, the corresponding get api **SLQSGetSysSelectionPrefExt** doesn’t return **LTEBandPrefExt** , so I can’t inspect it from there. I get a 0 for the **TlvPresent** byte, so I have to use AT!BAND to check anyway. I’m using the 04.00.25 version of the SDK, on an EM7565 running SWI9X50C\_01.11.00.00 (release 14). **UPDATE:** ok, i **kind of** got it working. By ignoring the LTE E-UTRA bands in **LTEBandPref** ( setting that to NULL ), and _just_ using **lteBandPrefExt** , I can turn band 66 on and off. I can now mimic the behaviour of AT!BAND through qmi api calls, and the results tie up. But **SLQSGetSysSelectionPrefExt** still doesn’t work for me. And, some transitions throw the cards into a funny state. Going from 3G only -\> 4g only, that doesn’t work ( the api’s return an error, and subsequent attempts also fail, until the cards are reset with AT!RMARESET ) ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [May 7, 2020, 9:57am UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245/4 "2020-05-07T09:57:34Z")
my testing: Using SLQS SDK version: SLQS04.00.23 Invoking test: SLQSGetSysSelectionPrefExt Test Case 19 / 19 : Valid Test Case - All parameters set Return Code: 0 (0x0) Return Reason: Success System Selection Preferences Emergency Mode: 0x0 Mode Preference: 0x3f Band Preference: 0x100600000ec00000 CDMA PRL Preference : 0xffff Roaming Preference : 0xff LTE Band Preference : 0xa700ba0e19df Network Selection Preference: 0x0 Service Domain Preference : 0x2 GSM - WCDMA Acquisition Order Preference : 0x0 Acquisition Order Preference : acq order len : 0x5 acq order: 0x8 acq order: 0x5 acq order: 0x4 acq order: 0x1 acq order: 0x2 Disabled RAT Bitmask: 0x0000 LTE Band Preference Ext.: bits\_1\_64: 0xa700ba0e19df bits\_65\_128: 0x2 bits\_129\_192: 0x0 bits\_193\_256: 0x0 Completed t1404… Test Completed ---------------------------------- ati3 Manufacturer: Sierra Wireless, Incorporated Model: EM7565 Revision: SWI9X50C\_01.08.04.00 dbb5d0 jenkins 2018/08/21 21:40:11 IMEI: 353533100134710 IMEI SV: 8 FSN: UF913580100215 +GCAP: +CGSM OK at!entercnd=“A710” OK AT!band? Index, Name, GW Band Mask L Band Mask 1 TDS Band 4 00, All bands 100600000EC00000 0000A700BA0E19DF 000000000000 OK ---
**Author:** ![mahtab.sarwar](https://avatars.discourse-cdn.com/v4/letter/m/7993a0/32.png) [@mahtab.sarwar](https://forum.sierrawireless.com/u/mahtab.sarwar)\ **Post date:** [May 7, 2020, 10:17am UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245/5 "2020-05-07T10:17:49Z")
Uh, no sorry I dont get that…SLQSGetSysSelectionPrefExt still returns 0 for LTEBandPrefExtTlv.TlvPresent and nothing for the band values. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [May 8, 2020, 1:57am UTC](https://forum.sierrawireless.com/t/qmi-sdk-band-66-bitmask-value/20245/6 "2020-05-08T01:57:02Z")
Then I cannot reproduce your problem. I used the same FW as yours: owner@CNHKG-EX-001367:~/QMI/SLQS04.00.23.src/pkgs/qa$ sudo ./qatesthostx86\_64 -p …/…/build/bin/hostx86\_64/slqssdk -n t1404 [sudo] password for owner: Using …/…/build/bin/hostx86\_64/slqssdk #devices: 1 deviceNode: /dev/qcqmi0 deviceKey: 00000000000000 Using SLQS SDK version: SLQS04.00.23 Invoking test: SLQSGetSysSelectionPrefExt Test Case 19 / 19 : Valid Test Case - All parameters set Return Code: 0 (0x0) Return Reason: Success System Selection Preferences Emergency Mode: 0x0 Mode Preference: 0x3f Band Preference: 0x100600000ec00000 CDMA PRL Preference : 0xffff Roaming Preference : 0xff LTE Band Preference : 0xa700ba0e19df Network Selection Preference: 0x0 Service Domain Preference : 0x2 GSM - WCDMA Acquisition Order Preference : 0x0 Acquisition Order Preference : acq order len : 0x5 acq order: 0x8 acq order: 0x5 acq order: 0x4 acq order: 0x1 acq order: 0x2 Disabled RAT Bitmask: 0x0000 LTE Band Preference Ext.: bits\_1\_64: 0xa700ba0e19df bits\_65\_128: 0x2 bits\_129\_192: 0x0 bits\_193\_256: 0x0 Completed t1404… Test Completed ---------------------------------- at OK at!band? Index, Name, GW Band Mask L Band Mask 1 TDS Band Mask L Band Mask 2 L Band Mask 3 L Band Mask 4 00, All bands 100600000EC00000 0000A700BA0E19DF 0000000000000000 0000000000000002 0000000000000000 0000000000000000 OK at!band=? Index, Name, GW Band Mask L Band Mask 1 L Band Mask 2 TDS Band Mask L Band Mask 3 L Band Mask 4 00, All bands 100600000EC00000 0000A700BA0E19DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000 01, Europe 3G 0002000000400000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 02, North America 3G 0000000004800000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 06, Europe 0002000000400000 00000000000801C5 0000000000000000 0000000000000000 0000000000000000 0000000000000000 07, North America 0000000004800000 000001000200185A 0000000000000002 0000000000000000 0000000000000000 0000000000000000 08, WCDMA ALL 100600000EC00000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 09, LTE ALL 0000000000000000 0000A700BA0E19DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000 ``` 0000000000000002 - B66 0000800000000000 - B48 0000200000000000 - B46 0000040000000000 - B43 0000020000000000 - B42 0000010000000000 - B41 0000000080000000 - B32 0000000020000000 - B30 0000000010000000 - B29 0000000008000000 - B28 0000000002000000 - B26 0000000000080000 - B20 0000000000040000 - B19 0000000000020000 - B18 0000000000001000 - B13 0000000000000800 - B12 0000000000000100 - B9 0000000000000080 - B8 0000000000000040 - B7 0000000000000010 - B5 0000000000000008 - B4 0000000000000004 - B3 0000000000000002 - B2 0000000000000001 - B1 1000000000000000 - B19 (850) 0004000000000000 - B9 (1700) 0002000000000000 - B8 (900) 0000000008000000 - B6 (800) 0000000004000000 - B5 (850) 0000000002000000 - B4 (1700) 0000000000800000 - B2 (1900) 0000000000400000 - B1 (2100) ``` OK ati3 Manufacturer: Sierra Wireless, Incorporated Model: EM7565 Revision: SWI9X50C\_01.11.00.00 5ba42f jenkins 2019/06/28 09:51:52 IMEI: 353533100134710 IMEI SV: 10 FSN: UF913580100215 +GCAP: +CGSM OK