# MangoH Red No Carrier issue
**URL:** https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290
**Category:** Uncategorized
**Created:** [March 8, 2021, 3:17pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290 "2021-03-08T15:17:21Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 8, 2021, 3:17pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/1 "2021-03-08T15:17:21Z")
Hello,
I recently got my MangoH red and started using a Vodafone sim. I am trying to call using atd1234567 command in Microcom /dev/ttyAT. But I am always getting NO CARRIER notification.
```
root@swi-mdm9x28-wp:~# microcom /dev/ttyAT
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7607
Revision: SWI9X07Y_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
IMEI: 359779080124634
IMEI SV: 6
FSN: VN842200870113
+GCAP: +CGSM
OK
atd1234567
NO CARRIER
at+cops=?
+cops: (2,"vodafone.de","vodafone","26202",7),(1,"Vodafone.de","Vodafone","26202",2),(1,"Vodafone.de","Vodafone","26202",0),(3,"o2 - de","o2 - de","26203",7),(3,"Telekom.de","TDG","26201",2),(3,"o2 - de","o2 - de","26203",0),(3,"o2 - de","o2 - de","26203",2),(3,"Telekom.de","TDG","26201",7),(3,"Telekom.de","TDG","26201",0),,(0,1,2,3,4),(0,1,2)
OK
at+cops?
+cops: 1,2,"26202",7
OK
+CMTI: "SM",8
+CMTI: "SM",8
atd1234567
NO CARRIER
```
Any help to troubleshoot this error will be appreciated.
Thanks
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 8, 2021, 3:19pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/2 "2021-03-08T15:19:15Z")
You need to type this in usb AT command port, also you missed the colon at the end
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 8, 2021, 3:47pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/3 "2021-03-08T15:47:08Z")
Hello @jyijyi, thanks for your reply. Can you explain a bit more. I am currently connected to the board and using the VM via USB. I have started the microcom /dev/ttyAT on the board. I also tried ATD1234567; now it shows ERROR.
cm data is connected.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 8, 2021, 4:09pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/4 "2021-03-08T16:09:52Z")
when you connect the module to the VM, there should be /dev/ttyUSB0-2 enumerated.
/dev/ttyUSB2 is the USB AT command port.
You should type the ATDxxxxxxx; in this port.
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 8, 2021, 4:24pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/5 "2021-03-08T16:24:59Z")
I am not getting the /dev/ttyUSB2 port on the VM when the board is connected.
```
mangoh@mangoh-vm:~$ dmesg | grep tty
[0.004000] console [tty0] enabled
mangoh@mangoh-vm:~$ microcom /dev/tty
tty tty20 tty33 tty46 tty59 ttyS12 ttyS25
tty0 tty21 tty34 tty47 tty6 ttyS13 ttyS26
tty1 tty22 tty35 tty48 tty60 ttyS14 ttyS27
tty10 tty23 tty36 tty49 tty61 ttyS15 ttyS28
tty11 tty24 tty37 tty5 tty62 ttyS16 ttyS29
tty12 tty25 tty38 tty50 tty63 ttyS17 ttyS3
tty13 tty26 tty39 tty51 tty7 ttyS18 ttyS30
tty14 tty27 tty4 tty52 tty8 ttyS19 ttyS31
tty15 tty28 tty40 tty53 tty9 ttyS2 ttyS4
tty16 tty29 tty41 tty54 ttyprintk ttyS20 ttyS5
tty17 tty3 tty42 tty55 ttyS0 ttyS21 ttyS6
tty18 tty30 tty43 tty56 ttyS1 ttyS22 ttyS7
tty19 tty31 tty44 tty57 ttyS10 ttyS23 ttyS8
tty2 tty32 tty45 tty58 ttyS11 ttyS24 ttyS9
mangoh@mangoh-vm:~$ microcom /dev/tty
```
From what I read in the forums. microcom /dev/ttyAT on the board should also be able to complete atd1234567; command?
I tried also the modemDemov example, but that also fail to send a message.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 8, 2021, 4:43pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/6 "2021-03-08T16:43:39Z")
I think you need to install usb driver in linux
[https://source.sierrawireless.com/resources/airprime/software/usb-drivers-linux-qmi-software-s2,-d-,42n2,-d-,64/](https://source.sierrawireless.com/resources/airprime/software/usb-drivers-linux-qmi-software-s2,-d-,42n2,-d-,64/)
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 8, 2021, 11:58pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/7 "2021-03-08T23:58:28Z")
I installed the qmi driver, GobiNet and GobiSerial and power cycled the board to check the the /dev/ttyUSB connection. But still can’t find the board any way of troubleshooting this?
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 12:51am UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/8 "2021-03-09T00:51:15Z")
Go to microcom, check
At!entercnd=“A710”
At!usbcomp?
At!usbcomp=?
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 9, 2021, 11:18am UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/9 "2021-03-09T11:18:31Z")
It gives an error for all three commands.
```
root@swi-mdm9x28-wp:~# microcom /dev/ttyAT
at
OK
At!entercnd=“A710”
ERROR
At!usbcomp?
ERROR
At!usbcomp=?
ERROR
```
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 12:17pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/10 "2021-03-09T12:17:06Z")
At!entercnd=“A710” should return OK, can you try one more module
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 9, 2021, 12:41pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/11 "2021-03-09T12:41:19Z")
Do you mean another module? I currently have only one mangoH Red.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 12:50pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/12 "2021-03-09T12:50:10Z")
“A710” the double quote should be "
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 9, 2021, 12:54pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/13 "2021-03-09T12:54:16Z")
Ah sorry yea it works.
```
root@swi-mdm9x28-wp:~# microcom /dev/ttyAT
AT
OK
At!entercnd="A710"
OK
At!usbcomp?
Config Index: 1
Config Type: 1 (Generic)
Interface bitmask: 0008010D (diag,nmea,modem,rmnet0,ecm)
OK
at!usbcomp=?
!USBCOMP:
AT!USBCOMP=,,
- configuration index to which the composition applies, should be 1
- 1:Generic
- DIAG - 0x00000001,
NMEA - 0x00000004,
MODEM - 0x00000008,
RAWDAT - 0x00000040,
RMNET0 - 0x00000100,
RMNET1 - 0x00000400,
RMNET2 - 0x00000800,
AUDIO - 0x00010000,
ECM - 0x00080000,
NCM - 0x00400000,
e.g.
9 - diag,modem interfaces enabled
10D - diag,nmea,modem,rmnet0 interfaces enabled
OK
```
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 12:55pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/14 "2021-03-09T12:55:46Z")
then the modem port is enabled.
Can you plug into Windows and see if you can see the modem port in device manager?
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 9, 2021, 1:05pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/15 "2021-03-09T13:05:16Z")
Yes, on device manager Windows:
Sierra wireless DM port (COM6)
Sierra Wireless NMEA Port (COM5)
It also shows the WWAN modem, Legato EthLink ECM and network adapter.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 1:07pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/16 "2021-03-09T13:07:27Z")
open the modem port with tera term or putty and then type ATD1234567;
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 9, 2021, 1:22pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/17 "2021-03-09T13:22:32Z")
It gives the same error.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 1:48pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/18 "2021-03-09T13:48:03Z")
What is the return of
At!gstatus?
---
### Author:  [@acek](https://mangoh.discourse.group/u/acek)
#### Post date: [March 9, 2021, 1:51pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/19 "2021-03-09T13:51:41Z")
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 9, 2021, 2:04pm UTC](https://mangoh.discourse.group/t/mangoh-red-no-carrier-issue/6290/20 "2021-03-09T14:04:23Z")
Is the sim ok for voice call?
I saw that ims is not registered, not sure if you need special apn
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