# App failed to receive SMS text from mobile phone

**URL:** <https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529>\
**Category:** mangOH Red\
**Created:** [May 28, 2020, 1:45am UTC](https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529 "2020-05-28T01:45:08Z")\
**Posts on this page:** 5\
**Page:** 2

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**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [June 10, 2020, 1:36am UTC](https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529/21 "2020-06-10T01:36:43Z")

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then i think that is ok

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**Author:** ![jeremyzhang](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@jeremyzhang](https://mangoh.discourse.group/u/jeremyzhang)\
**Post date:** [June 10, 2020, 3:58am UTC](https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529/22 "2020-06-10T03:58:39Z")

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I have tried with a different operator , but still not working,  
when I ran **at+cgreg?** , and get a **`+CGREG: 0,4`** , what does that mean?

```
root@swi-mdm9x28-wp:~# cm radio
Power: ON
Current Network Operator:
Current RAT: Module not registered on network, RAT not available
Status: Not registered and not currently searching for new operator (LE_MRC_REG_NONE)
Signal: No signal strength (0)
PS: Packet Switched Not registered (LE_MRC_REG_NONE)

root@swi-mdm9x28-wp:~# microcom /dev/ttyAT
at+cgreg?
+CGREG: 0,4

OK
root@swi-mdm9x28-wp:~# cm sim info
Type: EXTERNAL_SLOT_1
ICCID: 89302690201010562497
Home Network Operator:
EID:
IMSI: 302690500596401
Phone Number:

ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7702
Revision: SWI9X06Y_02.32.02.00 c2e98c jenkins 2019/08/30 07:28:21
IMEI: 352653090137381
IMEI SV: 4
FSN: VU838385211510
+GCAP: +CGSM

OK
at+cpin?
+CPIN: READY

OK
at!selrat?
!SELRAT: 02, GSM 2G Only

OK
at!band?
Index, Name
00, All bands

OK
at!gstatus?
!GSTATUS:
Current Time: 9220 Temperature: 37
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 1 Mode: ONLINE
System mode: GSM PS state: Not attached
IMS reg state: UNKNOWN IMS mode: Not Support
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
GSM band: GSM900
GSM channel: 9
GMM (PS) state:DEREGISTERED LIMITED SERVICE
MM (CS) state: IDLE PLMN SEARCH

Serving cell: 0 (Unknown )
RX level (dBm):0.0 LAC: 0000 (0)
GPRS state: GPRS IDLE Cell ID: FFFFFFFF (4294967295)

OK
at!impref?
!IMPREF:
 preferred fw version: 02.32.02.00
 preferred carrier name: SIERRA
 preferred config name: SIERRA_001.027_000
 preferred subpri index: 001
 current fw version: 02.32.02.00
 current carrier name: SIERRA
 current config name: SIERRA_001.027_000
 current subpri index: 001

OK
at+creg?
+CREG: 0,0

OK
```

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [June 10, 2020, 4:17am UTC](https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529/23 "2020-06-10T04:17:11Z")

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“4” in +CGREG means unknown reason…  
How about the generic FW here?

[https://source.sierrawireless.com/resources/airprime/software/wp77xx/wp77xx-firmware-release-12/#sthash.3cNN2f5a.dpbs](https://source.sierrawireless.com/resources/airprime/software/wp77xx/wp77xx-firmware-release-12/#sthash.3cNN2f5a.dpbs)

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<div class="post-metadata">

**Author:** ![jeremyzhang](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@jeremyzhang](https://mangoh.discourse.group/u/jeremyzhang)\
**Post date:** [June 10, 2020, 5:53am UTC](https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529/24 "2020-06-10T05:53:44Z")

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Do you know why it cannot register to network? is that because of the sim card?

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [June 10, 2020, 6:05am UTC](https://mangoh.discourse.group/t/app-failed-to-receive-sms-text-from-mobile-phone/4529/25 "2020-06-10T06:05:25Z")

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I don’t know, you can try other sim card

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