I am not sure what I did(possibly something with system selection preference, but can not recall), Now EM9191 remains in WCDMA when at!band is set to all band (0) and at!selrat=0(Automatic) at!gstatus? !GSTATUS: Current Time: 636 Temperature: 41 Modem Mitigate Level: 0 ModemProc Mitigate Level: 0 Reset Counter: 1 Mode: ONLINE System mode: WCDMA PS state: Not attached WCDMA band: WCDMA 2100 WCDMA channel: 3015 GMM (PS) state:NULL — MM (CS) state: IDLE NORMAL SERVICE WCDMA L1 state:L1M_PCH_SLEEP LAC: a172 (41330) RRC state: DISCONNECTED UTRAN Cell ID: 019db3f7 (27112439) RxM RSSI C0: -78 RxD RSSI C0: — RxM RSSI C1: — RxD RSSI C1: — OK When forcing it to LTE: at!selrat=04 OK at!gstatus? !GSTATUS: Current Time: 703 Temperature: 41 Modem Mitigate Level: 0 ModemProc Mitigate Level: 0 Reset Counter: 1 Mode: ONLINE System mode: Unknown PS state: Not attached Unknow System Mode OK It was working few days before as normal. But, possibly I did something silly. And, now not able to recover it. at!reset and complete power off/on does not help. Any lead what has caused this issue and how to recover it?

@jyijyi You are expert and life saver. AT!RMARESET did help. Putting the logs below for reference. Have a nice weekend… at!entercnd=“A710” OK at!RMARESET? !RMARESET: 0 Factory 1 Provision OK at!RMARESET=1 !RMARESET: DEVICE REBOOT REQUIRED Items Restored: 1273 Items Deleted: 33 Items Defaulted: 0 Items Skipped: 5 OK at!reset OK at!gstatus? !GSTATUS: Current Time: 172 Temperature: 40 Modem Mitigate Level: 0 ModemProc Mitigate Level: 0 Reset Counter: 1 Mode: ONLINE System mode: LTE PS state: Attached LTE band: B7 LTE bw: 20 MHz LTE Rx chan: 2850 LTE Tx chan: 20850 EMM state: Registered Normal Service RRC state: RRC Idle IMS reg state: REGISTERED IMS mode: Normal IMS Srv State: FULL SMS,NO VoIP PCC RxM RSSI: -81 PCC RxM RSRP: -113 PCC RxD RSSI: — PCC RxD RSRP: — Tx Power: – TAC: 8601 (34305) RSRQ (dB): -12.4 Cell ID: 04ccee04 (80539140) SINR (dB): 0.8 NR5G band: — NR5G bw: — NR5G Rx chan: — NR5G Tx chan: — NR5G RSRP (dBm): — NR5G RSRQ (dB): — NR5G SINR (dB): — OK

EM9191 remains in WCDMA and does not latch to LTE

IoT Modules MC/EM Series

jyijyi May 4, 2023, 11:53pm 2

does upgrading FW help?
does “AT!RMARESET” help?

EM9190 . EM9191 fw problem

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EM9191 remains in WCDMA and does not latch to LTE

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