SIM800L vs SIM7600: GSM vs 4G LTE Module Comparison India

Choosing between the SIM800L and SIM7600 is one of the most common dilemmas Indian makers face when building IoT and GSM-based projects. In this SIM800L vs SIM7600 comparison India guide, we break down every key difference — from data speeds and power consumption to price and availability — so you can pick the right module for your next Arduino or Raspberry Pi project without wasting money on the wrong hardware.

Module Overview: SIM800L and SIM7600

The SIM800L is a compact, ultra-low-cost GSM/GPRS module from SIMCom that has been a staple in the Indian maker community for nearly a decade. It operates on 2G networks and supports voice calls, SMS, and GPRS data — more than enough for basic IoT telemetry and remote control projects. You can find it for as little as ₹150–₹250 at most online electronics stores.

The SIM7600 (and its variants like SIM7600E for Europe/Asia, SIM7600G for global) is SIMCom’s flagship 4G LTE Cat-1 module. It supports LTE, WCDMA (3G), and GSM fallback, giving you multi-band flexibility. With real 4G data speeds and voice support over LTE, it’s aimed at developers building commercial-grade IoT solutions — dashcams, fleet trackers, industrial remote monitoring, and similar applications.

Both modules communicate via UART using the familiar Hayes AT command set, making firmware migration between them relatively straightforward for experienced developers.

Technical Specifications Compared

Network Compatibility in India

This is arguably the most critical factor for Indian hobbyists and engineers in 2024. Here’s the hard truth: 2G networks are being phased out rapidly in India. Reliance Jio never had a 2G network to begin with, and Airtel shut down most of its 2G infrastructure in metro areas. BSNL and Vodafone-Idea still maintain 2G coverage in rural India, but for how long is uncertain.

The SIM800L, being a 2G-only module, is becoming increasingly unreliable in urban areas. If you’re deploying a project in tier-1 or tier-2 Indian cities, you’ll frequently encounter no-signal or dropped connection issues that have nothing to do with your code. For prototyping and rural deployments where BSNL/Vi 2G coverage is strong, the SIM800L still works. But for production deployments in 2024 and beyond, it’s a gamble.

The SIM7600E (the Asia/Europe variant) supports the following LTE bands relevant to India:

• LTE FDD: B1 (2100 MHz), B3 (1800 MHz), B5 (850 MHz), B8 (900 MHz)
• LTE TDD: B40 (2300 MHz), B41 (2500 MHz) — critical for Jio and Airtel
• WCDMA: B1, B5, B8
• GSM: 850/900/1800/1900 MHz

This multi-band support means the SIM7600E works with all major Indian operators: Jio, Airtel, and Vi.

Power Consumption and Supply Requirements

Power supply is where many beginners stumble with both modules — but for different reasons.

SIM800L power challenges: Despite being a simple 2G module, the SIM800L draws burst currents of up to 2A during GSM transmission. This is notoriously problematic because most Arduino boards (including Uno and Nano) cannot supply this current through their 5V or 3.3V pins. The fix is always a dedicated LiPo battery or a high-current-capable 4V supply (Li-ion 18650 cells work perfectly) with 100–470µF capacitors across VCC and GND. Never power the SIM800L from an Arduino 3.3V pin directly.

SIM7600 power challenges: The SIM7600 is even more power-hungry — up to 3A peak. It typically operates at 3.3V–4.3V and almost always requires a dedicated power supply or at minimum a LiPo with a proper regulator. Breakout boards for the SIM7600 often include onboard regulators, but verify the current rating before powering from USB.

In sleep mode, the SIM800L wins hands-down at ~1mA versus the SIM7600’s ~2.5mA. For battery-operated IoT sensors that sleep most of the time and wake for occasional data transmission, the SIM800L’s sleep efficiency is a genuine advantage — where 2G coverage exists.

Which Module for Which Use Case?

Choose SIM800L if:

• You need a simple SMS alert system (temperature alerts, door open notifications)
• Budget is very tight (student projects, hackathons)
• Your deployment area has confirmed, reliable 2G coverage (check with a 2G-only phone)
• Data transfer needs are minimal (GPRS for sending a few bytes of sensor data)
• You’re learning GSM/AT-command programming for the first time
• Low sleep current is critical for solar/battery devices

Choose SIM7600 if:

• You’re building a commercial or semi-commercial IoT product
• Your deployment area is urban or semi-urban India (Jio/Airtel territory)
• You need to stream video, upload images, or transfer large data payloads
• You want integrated GNSS/GPS in a single module
• Future-proofing matters — 4G will outlast 2G by decades
• You need VoLTE quality calls

Price and Availability in India

The SIM800L module (bare chip or breakout board) is available from ₹150 to ₹300 on Indian e-commerce platforms and local component shops. The SIM800L EVB (evaluation board with USB, power regulation, and antenna) costs ₹400–₹600. The Adafruit FONA 808 — which combines GSM with GPS — is a premium option at around ₹2,500–₹3,000 but eliminates the need for a separate GPS module in tracking projects.

The SIM7600 breakout boards typically start at ₹1,500 and go up to ₹3,500+ depending on whether they include GNSS, USB support, and onboard power regulation. For prototyping, the SIM7600 is definitely a bigger investment, but for commercial projects the superior connectivity makes it worth every rupee.

Adafruit FONA 808 – Mini Cellular GSM + GPS Breakout

All-in-one GSM + GPS breakout ideal for vehicle trackers and asset monitoring. Works with Jio, Airtel, and Vi SIMs. Perfect for projects that need both cellular and location data without a separate GPS module.

View on Zbotic

DIY GSM/GPRS M590E Module Kit

Budget-friendly GSM/GPRS module kit for SMS-based projects and basic IoT telemetry. Great starting point for learning AT commands and cellular communication on Arduino.

View on Zbotic

15cm 3DBI GSM/GPRS/3G PCB Antenna with IPEX Connector

High-gain 3dBi antenna compatible with SIM800L, SIM7600, and other GSM/3G modules. Improves signal strength significantly in areas with weak coverage.

View on Zbotic

GPS NEO-6M Satellite Positioning Module for Arduino

Pair this GPS module with SIM800L for a complete vehicle tracker or asset monitoring solution. Fast satellite lock, UART interface, compatible with Arduino and STM32.

View on Zbotic

0.96 Inch I2C OLED LCD Module SSD1306

Display network status, signal strength (RSSI), and data in real-time on this compact OLED screen. Perfect companion for GSM/4G projects needing a status display.

View on Zbotic

Getting Started: AT Commands and Libraries

Both modules use AT commands for communication. Here are the essential ones you’ll use with either module:

• AT — Test communication (response: OK)
• AT+CPIN? — Check SIM card status
• AT+CSQ — Signal quality (0–31, higher is better)
• AT+CREG? — Network registration status
• AT+CMGF=1 — Set SMS text mode
• AT+CMGS="+919876543210" — Send SMS
• AT+SAPBR — Configure GPRS bearer (SIM800L)
• AT+CGDCONT — Set APN for data (SIM7600)

For Arduino, the popular TinyGSM library supports both the SIM800L and SIM7600, making it easy to switch between modules with minimal code changes. The SIM7600 AT Command Manual is available for download from SIMCom’s official website and is essential reading for advanced configurations.

Common APN settings for Indian operators:

• Jio: jionet
• Airtel: airtelgprs.com
• Vi (Vodafone-Idea): portalnmms
• BSNL: bsnlnet

Frequently Asked Questions