SIM Selection

Rinho devices with Dual SIM manage up to 2 SIM cards simultaneously, allowing carrier switching based on coverage, country, or network availability.

What is it for?

Use case	Description
🌍 Cross-border operation	Automatically switch SIM when crossing countries
📶 Coverage redundancy	Use SIM1 when SIM0 loses signal
💰 Cost optimization	Different plans based on geographical zone
🔄 Automatic failover	Transparent switching during carrier failure
🏢 Multiple clients	SIM0 for client A, SIM1 for client B

Compatible devices: Smart IoT C3, Smart IoT C5 and other models with Dual SIM slot.

Available Commands

📱SIM Command

Active SIM selection and query

→

⚙️CXSIM Command

Automatic SIM switching configuration

→

Operation Modes

Mode	Description
🔵 Fixed SIM0	Always uses SIM0
🟢 Fixed SIM1	Always uses SIM1
🔄 Auto	Automatically switches based on coverage
🌍 By country	Switches based on MCC (country code)

Configuration Example


// Query active SIM
>QSIM<
 
// Force SIM0 usage
>SSIM0<
 
// Force SIM1 usage
>SSIM1<
 
// Switch SIM when detecting country change
>SRL70E;TRG=MC00+;ACC={SSIM1}<    // When entering country X, use SIM1
>SRL71E;TRG=MC00-;ACC={SSIM0}<    // When leaving country X, return to SIM0

The two SIMs are numbered 0 and 1: SSIM0 and SSIM1 are the only valid values. There is no “SIM2” — SSIM2 is rejected with CMDERR.

Command	Function	Description
COPS	Carrier	Manually select carrier
MC	MCC Country	Detect country change
CXSIM	SIM Config	Advanced SIM parameters