# Mangoh Red ATT and Sierra sim card fails to register

**URL:** <https://mangoh.discourse.group/t/mangoh-red-att-and-sierra-sim-card-fails-to-register/1878>\
**Category:** mangOH Red\
**Created:** [September 3, 2018, 3:32pm UTC](https://mangoh.discourse.group/t/mangoh-red-att-and-sierra-sim-card-fails-to-register/1878 "2018-09-03T15:32:17Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![hposhtiw](https://avatars.discourse-cdn.com/v4/letter/h/a88e4f/32.png) [@hposhtiw](https://mangoh.discourse.group/u/hposhtiw)\
**Post date:** [September 3, 2018, 3:32pm UTC](https://mangoh.discourse.group/t/mangoh-red-att-and-sierra-sim-card-fails-to-register/1878/1 "2018-09-03T15:32:17Z")

</div>

Hi , I have MangOH red board with WP7702 module. I tried default sierra wireless sim as well as AT&T sim, I activated both sims but it has not been able to register to network yet.

Here is the output while firmware for Generic build 9.1 was flashed and ATT simcard is installed.

I have checked antenna, any switches, and other settings described in the guide but has not been able to get it registered yet.

root@swi-mdm9x28-wp:~# cm info  
Device: WP7702  
IMEI: 352653090005521  
IMEISV: 2  
FSN: VU749185081002  
[416.633782] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x0c1300c8 OPER:0x00000090  
Firmware Version: SWI9X06Y\_02.16.06.00 7605a6 jenkins 2018/06/20 17:56:12  
Bootloader Version: SWI9X06Y\_02.16.06.00 7605a6 jenkins 2018/06/20 17:56:12  
MCU Version: 002.009  
PRI Part Number (PN): 9907365  
PRI Revision: 001.004  
Carrier PRI Name: GENERIC  
Carrier PRI Revision: 001.028\_001  
SKU: 1103530  
Last Reset Cause: Reset, User Requested  
Resets Count: Expected: 50 Unexpected: 2

oot@swi-mdm9x28-wp:~# cm radio  
Power: ON  
Current Network Operator: AT&T  
Current RAT: LTE network (LE\_MRC\_RAT\_LTE)  
Status: Not registered and not currently searching for new operator (LE\_MRC\_REG\_NONE)  
Signal: Very strong signal strength (5)  
PS: Packet Switched Not registered (LE\_MRC\_REG\_NONE)

root@swi-mdm9x28-wp:~#

root@swi-mdm9x28-wp:~# cm data  
Index: 1  
APN: NXTGENPHONE  
PDP Type: IPV4V6  
Connected: no  
root@swi-mdm9x28-wp:~#

root@swi-mdm9x28-wp:~# cm sim info  
Type: EXTERNAL\_SLOT\_1  
ICCID: 89014104271026178993  
Home Network Operator: AT&T  
EID:  
IMSI: 310410102617899  
Phone Number:  
root@swi-mdm9x28-wp:~#

root@swi-mdm9x28-wp:~# cm data connect  
Setting up profile 1  
Connecting … failed  
Sun Jan 6 00:19:19 UTC 1980 - Connection Failure: LE\_FAULT

ATI  
Manufacturer: Sierra Wireless, Incorporated  
Model: WP7702  
Revision: SWI9X06Y\_02.16.06.00 7605a6 jenkins 2018/06/20 17:56:12  
IMEI: 352653090005521  
IMEI SV: 2  
FSN: VU749185081002  
+GCAP: +CGSM

OK

AT!GSTATUS?  
!GSTATUS:  
Current Time: 209 Temperature: 33  
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0  
Reset Counter: 5 Mode: ONLINE  
System mode: LTE PS state: Not attached  
LTE band: No band LTE bw: 1.4 MHz  
LTE Rx chan: 0 LTE Tx chan: 4294967295  
LTE CA state: INACTIVE  
EMM state: Deregistered Attach Needed  
RRC state: RRC Idle  
IMS reg state: No Srv

PCC RxM RSSI: 0 RSRP (dBm): 0  
PCC RxD RSSI: 0 RSRP (dBm): 0  
Tx Power: 0 TAC: FFFF (65535)  
RSRQ (dB): 0 Cell ID: FFFFFFFF (4294967295)  
SINR (dB): 0

OK

AT+CMEE=1  
OK  
AT+COPS?  
+COPS: 1

OK  
AT!BAND?  
Index, Name  
00, All bands

OK  
AT!SELRAT?  
!SELRAT: 12, GSM and LTE Only

OK  
AT+COPS=?  
OK

AT+COPS=1,2,“310410”  
OK

root@swi-mdm9x28-wp:~# cm radio off  
root@swi-mdm9x28-wp:~# cm radio on  
root@swi-mdm9x28-wp:~# cm data connect  
Setting up profile 1  
Connecting … failed  
Sun Jan 6 00:23:07 UTC 1980 - Connection Failure: LE\_FAULT  
root@swi-mdm9x28-wp:~#

I would appreciate if you could please let me know how to proceed or debug this further?