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

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

Product ID: 26587866

Details

Brand
HiLetgo
Connectivity Technology
GSM GPRS
Included Components
1*SIM800L GPRS
Model Name
3-01-1090-A
Wireless Communication Standard
900 MHz Radio

📶Quad-band GSM 850/900/1800/1900MHz

🔋Ultra-low 1mA sleep current

🔌3.7~4.2V power input

66.18 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

COMPACT YET MIGHTY - Smallest SIM800L breakout module that packs full GSM, SMS, GPRS, and FM radio capabilities.
POWER SMART DESIGN - Maximize efficiency with ultra-low 1mA sleep mode current—perfect for always-on IoT projects.
VERSATILE COMMUNICATION - Supports voice calls, SMS, GPRS data, FM radio, buzzer & vibration motor control for dynamic applications.
PLUG PLAY UART INTERFACE - Effortlessly integrate with microcontrollers via TTL serial port and auto baud AT command detection.
GLOBAL QUAD BAND CONNECTIVITY - Seamlessly connect anywhere with 4 frequency bands for worldwide GSM/GPRS coverage.

The HiLetgo SIM800L GPRS GSM Breakout Module is a compact, quad-band GSM/GPRS board designed for seamless global connectivity. Operating at 3.7~4.2V with ultra-low power consumption (1mA in sleep mode), it supports voice calls, SMS, GPRS data transmission, and FM radio. Featuring a UART TTL serial interface with auto baud detection, it easily integrates with popular microcontrollers like Arduino and Raspberry Pi, making it an ideal choice for professional IoT and remote communication projects.

Specifications

ASIN	B01DLIJM2E
Best Sellers Rank	#3,724 in Single Board Computers (Computers & Accessories)
Brand	HiLetgo
Built-In Media	1*SIM800L GPRS GSM Breakout Module
Compatible Devices	8051, AVR, ARM, PIC, Arduino, Raspberry Pi
Connectivity Technology	GSM, GPRS
Customer Reviews	4.2 4.2 out of 5 stars (133)
Manufacturer	HiLetgo
Mfr Part Number	3-01-1090-A
Model Name	3-01-1090-A
Model Number	3-01-1090-A
Number of Items	1
Processor Count	1
Wireless Compability	900 MHz Radio Frequency

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66.18 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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