Are there any 2g networks still available in the usa ? at&t and others have shut down 2g systems.

better looking for 3G/4G. hologram.io is going to stop offering 2g cellular network service soon.

Do Hologram sim cards work with this product? I'm having trouble attaching to the network. (The sim was recognized)

Yes, it should work if properly configured

¿Does this product supports ussd codes?

YES... but remember that USSD, SMS etc. are protocols and therefore will require specialized parsing of incoming data as well as the protocol specific structure of outgoing data... I have seen 'some' sample USSD samples in the Arduino world... I am not aware of any LIBARIES... Also I have not actually worked with this protocol myself in the IoT environment. Know that MOST ALL cell phones (chipsets) that are GSM specification will support the USSD protocol.

Is this G3 compatible?

Do you mean 3G compatible. The device is not, the Hologram SIM is

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HiLetgoSmallest SIM800L GPRS GSM Breakout Module Quad-Band 850/900/1800/1900MHz SIM Card Slot Onboard with Antenna 3.7~4.2V

HiLetgoSmallest SIM800L GPRS GSM Breakout Module Quad-Band 850/900/1800/1900MHz SIM Card Slot Onboard with Antenna 3.7~4.2V

Product ID: 396513806

Details

Brand
HiLetgo
Model name
Quad-Band
Connectivity technology
GSM GPRS
Included components
[1*SIM800L GSM
CPU manufacturer
MediaTek

📡Onboard antenna & SIM card slot

📶Quad-band GSM/GPRS 850/900/1800/1900MHz

🔋Ultra-low 1mA sleep mode current

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Description

🌍 Stay connected everywhere, powered smartly, and control effortlessly!

COMPACT YET MIGHTY - Smallest breakout module that packs full GSM/GPRS capabilities without bulk.
POWER SMART DESIGN - Maximize efficiency with ultra-low 1mA sleep current, extending your device's uptime.
COMMAND YOUR NETWORK - Supports advanced AT commands for flexible, remote SMS and data control.
PLUG PLAY UART INTERFACE - Effortlessly integrate with microcontrollers via auto-baud TTL serial communication.
GLOBAL CONNECTIVITY ZERO LIMITS - Seamlessly operate on any GSM network worldwide with quad-band support.

The Smallest SIM800L GPRS GSM Breakout Module is a compact, quad-band 850/900/1800/1900MHz GSM/GPRS device featuring an onboard SIM card slot and antenna. It supports low power consumption with just 1mA in sleep mode and communicates via a UART TTL serial port with auto-baud detection, making it ideal for seamless integration with microcontrollers for remote SMS and data transmission.

Specifications

ASIN	B01DLIJM2E
Best Sellers Rank	#1,517 in Single Board Computers (Computers & Accessories)
Brand	HiLetgo
Compatible Devices	8051, AVR, ARM, PIC, Arduino, Raspberry Pi
Connectivity Technology	GSM, GPRS
Customer Reviews	4.1 4.1 out of 5 stars (131)
Manufacturer	HiLetgo
Mfr Part Number	3-01-1090-A
Model Name	3-01-1090-A
Model Number	3-01-1090-A
Processor Count	1
Wireless Compability	900 MHz Radio Frequency

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167166Fr

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Congo.

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