# EM9191 : AT+CFUN=1 returns CME ERROR: operation not supported

**URL:** <https://forum.sierrawireless.com/t/em9191-at-cfun-1-returns-cme-error-operation-not-supported/28467>\
**Category:** MC/EM Series\
**Created:** [November 29, 2022, 1:21pm UTC](https://forum.sierrawireless.com/t/em9191-at-cfun-1-returns-cme-error-operation-not-supported/28467 "2022-11-29T13:21:02Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![agauthier](https://avatars.discourse-cdn.com/v4/letter/a/ebca7d/32.png) [@agauthier](https://forum.sierrawireless.com/u/agauthier)\
**Post date:** [November 29, 2022, 4:28pm UTC](https://forum.sierrawireless.com/t/em9191-at-cfun-1-returns-cme-error-operation-not-supported/28467/5 "2022-11-29T16:28:36Z")

</div>

It seems to always drop to LTE for some reason.

```auto
!GSTATUS: 
Current Time: 163 Temperature: 49
Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
Reset Counter: 1 Mode: ONLINE         
System mode: LTE PS state: Attached     
LTE band: B4 LTE bw: 15 MHz  
LTE Rx chan: 2025 LTE Tx chan: 20025
EMM state: Registered Normal Service 
RRC state: RRC Idle       
IMS reg state: UNKNOWN IMS mode: Not Support  
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
PCC RxM RSSI: -68 PCC RxM RSRP: -105
PCC RxD RSSI: -94 PCC RxD RSRP: -138
Tx Power: -- TAC: 717a (29050)
RSRQ (dB): -16.8 Cell ID: 00cb0e03 (13307395)
SINR (dB): 12.4
NR5G band: --- NR5G bw: ---
NR5G Rx chan: --- NR5G Tx chan: ---
NR5G RSRP (dBm): --- NR5G RSRQ (dB): ---
NR5G SINR (dB): ---

```

How can I get a hold of 1.7.19.0?

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