Sequans Monarch 2 GM02S: APN and network setup with an IoT SIM

Updated 27 October 2026

The Sequans Monarch 2 GM02S is a cellular module for LTE-M and NB-IoT. With an IoT SIM, you set the APN with AT+CGDCONT=1,"IP","<apn>", choose the radio technology, then check that the module is registered, at home or in roaming. Vendor commands come from Sequans's manuals, standard ones from 3GPP TS 27.007; each cites its document.

Key facts

The GM02SP is the same module with GNSS.

Source: Sequans, Monarch product page. Checked 27 October 2026.

Set the APN

AT+CFUN=0
AT+CGDCONT=1,"IP","<apn>"
AT+CFUN=1

The manual requires the module not to be attached (+CEREG other than 1 or 5) when the context is defined.

Source: Sequans GM02S AT Commands Reference Manual (LR82, Rev. 5a) (document).

Replace <apn> with the APN shown in your M2M.global account: the internet APN, or your private APN.

Choose the radio technology

AT+CFUN=0
AT+SQNMODEACTIVE=1
AT^RESET

1 = LTE-M (default), 2 = NB-IoT. The command works only in CFUN=0, and the modem must be reset to switch modes (AT^RESET).

Source: Sequans GM02S AT Commands Reference Manual (LR82, Rev. 5a) (document).

Open the data connection

AT+CGACT=1,1

Source: Sequans GM02S AT Commands Reference Manual (LR82, Rev. 5a) (document).

Check that it works

AT+CPIN?        SIM ready? expect +CPIN: READY
AT+CEREG?       LTE registration: stat 1 = home network, 5 = roaming
AT+COPS?        network the module is using
AT+CGDCONT?     APN actually configured
AT+CESQ

An IoT SIM that works in many countries is often registered in roaming: +CEREG: 0,5 is a valid, working registration. Firmware that waits only for status 1 (home network) never goes online on such a SIM. Status values come from 3GPP TS 27.007; the signal command from Sequans GM02S AT Commands Reference Manual (LR82, Rev. 5a).

To save battery, request PSM with AT+CPSMS and eDRX with AT+CEDRXS (3GPP TS 27.007); the network decides which timers it grants.

Networks and shutdowns

• LTE-M and NB-IoT run on 4G networks, but not every operator offers them, and roaming on them depends on agreements between operators. Check the coverage by country before you deploy.
• No 2G or 3G dependency: the Monarch 2 GM02S is not affected by 2G and 3G shutdowns.
• Private delivery works with any module: the privacy is in the network path, not in the device. See private delivery.

The SIM: IoT SIM cards and IoT eSIM. All commands explained: AT commands.