What is the SIM A7670C R2 module?

The SIM A7670C R2 is an LTE Cat 1 cellular communication module designed for embedded applications requiring 4G LTE, GSM, GPRS, and EDGE connectivity.

What LTE speed does the A7670C support?

The A7670C supports LTE Cat 1 speeds of up to 10Mbps downlink and 5Mbps uplink.

Which LTE bands does the A7670C support?

The A7670C supports LTE-FDD B1, B3, B5, and B8, along with LTE-TDD B34, B38, B39, B40, and B41.

Does the A7670C support GSM and GPRS?

Yes. The A7670C supports GSM 900/1800MHz as well as GPRS and EDGE communication.

Can I use the A7670C with STM32?

Yes. The module can be integrated with STM32 and other microcontrollers through suitable UART and control interfaces.

Can I use the A7670C with Raspberry Pi?

Yes. It can be used with Raspberry Pi-based projects when the required serial, USB, power, antenna, and modem software interfaces are properly implemented.

What is the supply voltage of the A7670C?

The bare A7670C module is specified for approximately 3.4V to 4.2V, with 3.8V typical. The supplied product listing specifies 5V to 8.4V for the offered board or assembly, so the exact board power input should be verified before use.

How is the A7670C controlled?

The module can be controlled through its UART serial interface using AT commands.

What is the default UART baud rate?

The supplied specification lists 115200bps as the default baud rate, with supported rates from 300bps to 3686400bps.

What are the operating temperature limits?

The supplied product specification lists -30°C to +80°C as the operating range and -40°C to +85°C as the extended operating range. SIMCom's A7670C module specification lists -40°C to +85°C.

Is the A7670C a 4G LTE module?

Yes. It is an LTE Cat 1 module that provides 4G LTE connectivity while also supporting GSM, GPRS, and EDGE modes.

Is the A7670C suitable for IoT projects?

Yes. Its LTE Cat 1 connectivity, serial control, and support for embedded interfaces make it suitable for telematics, surveillance, POS, industrial routers, remote diagnostics, and other IoT applications.

SIM A7670C R2 4G LTE GSM Module – LTE Cat 1, GSM/GPRS/EDGE, 10Mbps, STM32 & Raspberry Pi Compatible

Name: SIM A7670C R2 4G LTE GSM Module – LTE Cat 1, GSM/GPRS/EDGE, 10Mbps, STM32 & Raspberry Pi Compatible
Brand: KathalTech
SKU: sim-a7670c-r2-4g-lte-gsm-module-lte-cat-1-gsm-gprs-edge-10mbps-stm32-raspberry-pi-compatible
Price: 3998.00 BDT
Availability: InStock
Rating: 5.0 (1 reviews)

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৳3,998.00

VAT inclusive; Computed calculations added locally.

The SIM A7670C R2 4G LTE GSM Module is an LTE Cat 1 cellular communication solution supporting LTE-TDD, LTE-FDD, GSM, GPRS, and EDGE connectivity. It provides up to 10Mbps download and 5Mbps upload, UART-based AT-command control, and interfaces suitable for STM32, Raspberry Pi, and other embedded systems. The module is designed for IoT applications including telematics, surveillance, POS systems, industrial routers, and remote diagnostics. SIMCom specifies the A7670C with LTE-FDD B1/B3/B5/B8 and LTE-TDD B34/B38/B39/B40/B41 support.

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Overview

The SIM A7670C R2 4G LTE GSM Module brings LTE Cat 1 connectivity to embedded and IoT projects that require reliable cellular data communication. It supports LTE-TDD, LTE-FDD, GSM, GPRS, and EDGE communication modes, with LTE Cat 1 data rates of up to 10Mbps downlink and 5Mbps uplink.

With support for standard embedded interfaces such as UART, the module can be integrated with microcontrollers and Linux-based development platforms. AT commands can be used for modem control, configuration, network management, and data communication. The A7670 series also provides a broad set of software and network functions intended for IoT applications.

The A7670C is suitable for applications such as vehicle telematics, surveillance equipment, POS terminals, industrial routers, remote diagnostics, and other connected devices. Its compact LGA form factor is designed for space-conscious embedded designs.

Product images are for illustrative purposes only and may differ from the actual product.

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Verified Comments Listing

The SIM A7670C R2 is a compact LTE Cat 1 cellular module designed for embedded wireless communication. It combines LTE data connectivity with GSM/GPRS/EDGE support, making it suitable for projects that require cellular communication across supported networks.

The module supports a maximum LTE data rate of 10Mbps downlink and 5Mbps uplink. It provides UART serial communication and AT-command control for configuring and operating the modem.

The A7670C variant supports LTE-FDD B1/B3/B5/B8, LTE-TDD B34/B38/B39/B40/B41, and GSM 900/1800MHz. This makes it particularly suited to supported LTE and GSM networks in regions where these bands are deployed.

Features

LTE Cat 1 cellular communication.
Supports LTE-TDD and LTE-FDD.
Supports GSM, GPRS, and EDGE.
Up to 10Mbps LTE download speed.
Up to 5Mbps LTE upload speed.
LTE-FDD B1/B3/B5/B8.
LTE-TDD B34/B38/B39/B40/B41.
GSM 900/1800MHz.
GPRS Multislot Class 12.
EDGE Multislot Class 12.
UART serial interface.
AT-command control.
Supports serial baud rates from 300bps to 3686400bps.
Default baud rate of 115200bps.
One audio interface.
Compact LGA module form factor.
Suitable for embedded IoT applications.
Compatible with host systems such as STM32 and Raspberry Pi when the appropriate hardware interface and software configuration are provided.

Applications

Vehicle telematics and tracking.
Fleet management systems.
Remote surveillance.
POS terminals.
Industrial IoT gateways.
Industrial routers.
Remote equipment monitoring.
Remote diagnostics.
Smart monitoring systems.
Cellular data logging.
GSM/LTE automation systems.
Connected embedded devices.

How to Use

Confirm the exact hardware variant and its required supply voltage before powering the module.
Insert a compatible SIM card if the carrier/network application requires one.
Connect the appropriate cellular antenna before network operation.
Connect the module's UART interface to the STM32, Raspberry Pi, or other host controller using the appropriate electrical interface.
Apply a stable power supply suitable for the supplied board/variant.
Allow the modem to initialize and register with a supported cellular network.
Open a serial terminal or communicate through the host controller.
Send supported AT commands to configure the module and check network status.
Configure the required LTE/GPRS data connection according to the carrier and application.
For Raspberry Pi or Linux-based systems, use the appropriate serial/USB communication method and modem software for the specific hardware implementation.

Important Notes

The bare A7670C module operates from approximately 3.4–4.2V, with 3.8V typical according to SIMCom. Do not apply 5V directly to the bare module's supply pins.
The supplied 5–8.4V specification should be treated as the input requirement of the offered board/assembly, not as the bare modem's supply voltage.
Verify the exact R2 board's power circuitry and pinout before connecting an external supply.
Cellular modules can experience substantially higher instantaneous current demand during transmission than during idle or hibernation. Use an adequately rated, stable power source and suitable decoupling.
Network availability depends on the local carrier and supported frequency bands.
The A7670C and A7670E are different variants. Do not use A7670E band information when configuring an A7670C installation.
The A7670C official band configuration is LTE-FDD B1/B3/B5/B8 and LTE-TDD B34/B38/B39/B40/B41; the supplied B7/B20 entries should not be attributed to the A7670C variant.
Maximum LTE speed is a modem capability, not a guaranteed real-world network speed.
A suitable SIM card and carrier service are required for cellular connectivity.
Antenna selection and placement significantly affect cellular performance.
UART voltage levels must be checked before directly connecting to a microcontroller or Raspberry Pi.
AT commands and available functions can depend on firmware version and module configuration.
Please allow approximately 5% measuring deviation for manually measured product/shipment dimensions where applicable.
Product images and physical board layouts may differ from the actual supplied variant.

Package Includes

1 × SIM A7670C R2 4G LTE GSM Module Compatible with STM32 / Raspberry Pi / ESP32

Specification	Details
Product Name	SIM A7670C R2 4G LTE GSM Module
Module	A7670C
Network Category	LTE Cat 1
Communication Modes	LTE-TDD, LTE-FDD, GSM, GPRS, EDGE
LTE-FDD Bands	B1, B3, B5, B8
LTE-TDD Bands	B34, B38, B39, B40, B41
GSM Bands	GSM 900 / DCS 1800
LTE Data Rate	Up to 10Mbps Downlink / 5Mbps Uplink
GPRS	Multislot Class 12
EDGE	Multislot Class 12
Board/Input Supply	5V–8.4V, according to supplied variant
Bare A7670C Module Supply	3.4V–4.2V, typical 3.8V
Hibernation Current	<3mA, according to supplied specification
Audio Interface	1 set audio interface
Serial Interface	Main UART / Serial Port
Baud Rate	300bps to 3686400bps
Default Baud Rate	115200bps
Control	AT Commands
LTE Transmit Power	Class 3, approximately 23dBm ±2.7dB
GSM 900 Transmit Power	Class 4, approximately 33dBm ±2dB
DCS 1800 Transmit Power	Class 1, approximately 30dBm ±2dB
Operating Temperature	-30°C to +80°C
Extended Operating Temperature	-40°C to +85°C
Storage Temperature	-45°C to +90°C
Module Form Factor	LGA
Module Dimensions	24mm × 24mm × 2.3mm
Shipment Weight	0.021kg
Shipment Dimensions	6 × 5 × 3cm

The A7670C's official SIMCom specifications list the module at 24 × 24 × 2.3mm, with 3.4–4.2V module supply and -40°C to +85°C operating temperature; the supplied product information additionally lists a 5–8.4V input specification and a -30°C to +80°C normal operating range for the offered product.