COPS Command — Network Registration and Operator Selection

Sets the cellular network registration policy (technology and operator selection) and the network registration manager that provides automatic recovery.

What is it for?

📡 Main use cases:

🌐 Force an access technology (2G / 4G) where the device must lock to a RAT
🏢 Set a manual operator with automatic fallback (controlled roaming, specific PLMN)
🔧 Registration diagnostics on difficult networks (LATAM, LTE attach rejection)
🔁 Return to pure automatic mode (factory default)
🛟 Enable or disable the registration manager (recovery ladder) without OTA

Robust network registration (modes ""/2G/4G/M,<plmn> and the SCRM manager) is available from firmware v1.09.24. The raw COPS format (SCOP<sim>4,2,"plmn") works from v1.00.00 and is kept for backward compatibility.

SCOP — Network registration policy

SCOP is configured per SIM. The SIM index goes right after SCOP:

Index	SIM
`0` or `S`	SIM0
`1`	SIM1

The value to the right of the index defines the policy:

Value	Policy	Behavior
(empty) `""`	Pure automatic	Automatic RAT + automatic operator selection. Factory default.
`2G`	Forced 2G RAT	Limits the scan to 2G/GSM, automatic operator.
`4G`	Forced 4G RAT	Limits the scan to LTE, automatic operator.
`3G`	Forced 3G RAT	Only on modems that support it; otherwise returns to automatic.
`M,<plmn>[,<act>]`	Manual operator with fallback	Selects the given PLMN in manual mode with automatic fallback. Optional `<act>` = access technology.
`<digits>…`	Raw COPS string (legacy)	Sent as-is as an `AT+COPS` parameter. Backward compatibility.

The guaranteed RAT tokens are 2G and 4G. 3G is accepted and applied only on modems that support it.

Examples (v1.09.24 modes)


// Pure automatic (default): automatic RAT and operator
>SCOP0<
>RCOP0<
 
// Force LTE on SIM0
>SCOP04G<
>RCOP04G<
 
// Force 2G on SIM1
>SCOP12G<
>RCOP12G<
 
// Manual operator with fallback (PLMN 72207, Movistar Argentina)
>SCOPM,72207<
>RCOPM,72207<
 
// Query the current policy of SIM0
>QCOP0<
>RCOP04G<

Raw COPS format (legacy, backward compatible)

The classic AT+COPS format is still supported: pass the raw string after the SIM index.

Examples by Argentine operator


>SCOPS4,2,"722310"<    // Claro Argentina (ex CTI)
>SCOPS4,0,"UNIFON"<    // Movistar Argentina
>SCOPS4,0,"PERSONAL"<  // Personal Argentina
>SCOP14,0,"UNIFON"<    // Movistar on SIM1

LTE module configuration (prioritizes GSM with LTE fallback)

Operator	Command	Priority
📱 Claro	`>SCOPS4,2,"722310",0<`	GSM → LTE
📱 Personal	`>SCOPS4,2,"72234",0<`	GSM → LTE
📱 Movistar	`>SCOPS4,2,"72207",0<`	GSM → LTE

COPS works together with the CXAPN command for full connectivity configuration.

SCRM — Network registration manager (kill-switch)

When the registration manager is on (default), the device applies a recovery ladder during network registration: it waits, resets the radio and retries the RAT/operator selection before escalating to a reboot, avoiding getting stuck on a technology the network rejects.

SCRM works as a reversible kill-switch (over SMS, no OTA needed):

Command	Action
`SCRM1`	Enables the registration manager (default)
`SCRM0`	Disables the manager (legacy behavior: applies the selection and continues, no ladder)
`SCRM`	Queries the current state

The state is persisted in non-volatile memory (key CEL.REGMGR) and the default value is 1 (on).


>SCRM<
>RCRM1<     // Manager on
 
>SCRM0<
>RCRM0<     // Disabled (legacy)

Compatibility

💾Firmware:v1.00.00

Dispositivo	Notas
SpiderLegacy	Raw COPS format only
UltraliteLegacy	Raw COPS format only
MinitrackLegacy	Raw COPS format only
C3Legacy	Raw COPS format only
C5 SmartLegacy	Raw COPS format only
Spider IoT	2G/4G/M modes and SCRM from v1.09.24
Smart IoT	2G/4G/M modes and SCRM from v1.09.24
Zero IoT	2G/4G/M modes and SCRM from v1.09.24