YX 32 ports 2G Bulk Send SMS Modem AT Command IMEI Change 32 SIM GSM Modem

What This Modem Does

Every card in this unit gets its own channel. Thirty-two SIM slots sit in one chassis, each wired to a separate port that registers on the mobile network by itself, so the pool behaves like 32 handsets fed by a single USB cable. Messages travel over COM ports rather than a data connection, which keeps the sending path independent of office internet and lets one PC control the whole array from a single screen. It is built for operations that already hold a SIM fleet and want to retire a shelf of single-port dongles, which is where a multi-port SMS modem of this size earns its place.

It features 32 independent 2G GSM communication ports and 32 standard SIM card slots (1 SIM per port), powered by original Quectel M26/M35 quad-band 2G modules. Supporting global GSM 850/900/1800/1900MHz frequency bands, it connects to Windows PC via USB for stable, ultra-high-efficiency bulk SMS sending & receiving.

This modem is compatible with SMS Caster E-Marketer bulk SMS software, supporting 32-channel concurrent SMS transmission, batch contact management. It is the top choice for enterprises, SMS operators, and marketing agencies engaged in large-scale bulk SMS services.

Setup and First Run

1. Load the SIM cards — one card in each of the 32 slots, and note which number sits in which position so you can match a port to a card later.
2. Connect power and USB — attach the supplied adapter, then run the USB cable to your PC.
3. Install the USB driver — on Windows this is a one-click install, after which the system lists all 32 COM ports.
4. Install and activate SMS Caster — activation is a one-time step before the first batch.
5. Go live, or go deeper — import a list and start the batch, or attach this USB SMS modem with AT command support to one port with a terminal tool such as PuTTY for balance queries, PIN/PUK settings or other single-card changes.
6. Ask for help if a port misbehaves — provide instruction manual, and our technicians can work through driver, software or connection problems with you remotely.

Core Features & Highlights

1. 32 Independent 2G GSM Concurrent Channels — 32 simultaneous SMS transmission channels, 32 SIM cards working in parallel; the industry’s top-level 2G SMS sending efficiency for large-scale campaigns.
2. Quectel M26/M35 Industrial 2G Modules — Built-in original Quectel M26/M35 modules, global quad-band GSM (850/900/1800/1900MHz), industrial-grade stability, 24/7 uninterrupted operation.
3. USB Plug-and-Play & XR21V1414 Chip — Industrial USB UART chip, stable high-speed data transmission; supports Windows 7/8/10/11 (32/64-bit), one-click driver installation without complex settings.
4. Full-Scale SMSCaster Bulk SMS Functions — Supports 32-port concurrent detection, CSV/TXT contact import, group management, scheduled SMS, interval sending, auto-prefix, long SMS/flash SMS.
5. Advanced AT Command Control — Supports IMEI modification, USSD balance query, voice call, PIN/PUK configuration via PuTTY, meeting professional configuration needs.
6. Heavy-Duty Industrial Chassis — Metal anti-interference shell, stable multi-port power supply, AC 100-240V wide voltage, 0-40°C working temperature, designed for long-term large-scale operation.

Ideal Application Scenarios

1. Large-Scale Bulk SMS Marketing Campaigns — Nationalwide promotional SMS, brand promotion, merchant alliance marketing, high-volume advertising SMS.
2. Enterprise-Level OTP & Verification SMS — Large-scale user registration, login, payment verification SMS for apps, platforms, and financial systems.
3. Cross-Regional Enterprise Notification Service — Group-wide alerting, logistics updates, bill reminders, device monitoring alarms for large enterprises.
4. Government & Public Service SMS Broadcasting — Large-scale public welfare announcements, emergency alerts, policy promotion for governments and public institutions.
5. SMS Operator & Agency Specialized — Professional bulk SMS service providers, multi-customer SMS outsourcing, commercial SMS operation.

Technical Support & Model Matching

Every modem we ship includes a instruction manual, and our engineers stay with you well past delivery. Tell us your country, carrier bands, network generation, port count and operating system, and we will match you to the right configuration. We also guide driver installation and SMS Caster / SMS Deliverer setup, help you configure AT command, STK and IMEI-change functions, and work through connection or sending faults with you through remote technical assistance. Not sure which option suits your messaging volume? Ask our team before you order.
Whatsapp: +8615220722893
Emai: yx@yxinternet.com
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Why Choose YX 2G GSM 32 Port SMS Modem?

1. Large-Scale Bulk SMS Exclusive — 32 concurrent channels, the best choice for high-volume SMS operations.
2. Industrial-Grade Stability — Heavy-duty design for 24/7 operation, suitable for commercial SMS operators.
3. Full Compatibility & Easy Control — SMS Caster optimized, one-click 32-port management.
4. High-Capacity Anti-Block Design — Interval sending & SIM management reduce blocking risk.
5. Professional After-Sales Support — Dedicated technical team for large-scale device debugging.

FAQ

Q1. Will it work on the network my SIM cards use?

It needs live 2G service, and there is no 3G or 4G fallback on this model. Ask the carrier whether 2G is still active on the numbers you plan to use, and if your market has retired the technology, a 4G LTE model from the same range is the right replacement. We can check the destination country with you before you order.

Q2. Can one computer keep 32 ports busy at the same time?

Yes — every port appears as its own connection, so a single computer drives the whole pool as a high-volume SMS sender. How close a card gets to the quoted per-port speed depends on its SIM plan and the signal where the pool sits, and a slow card on one port does not hold the others back.

Q3. Can I use my own SMS platform instead of SMS Caster?

Yes — SMS Caster ships with the unit and is the software we test with, but the ports are standard COM devices, so a platform that drives a modem through AT commands can address them too. That is the usual setup for a high-volume SMS service that already runs its own campaign or reporting tools. Tell us the platform and version you use and we will confirm the match before you order.

Q4. Can I use the larger 1FF SIM cards?

Yes — the default slot in this USB SMS modem with AT command support takes a 2FF mini SIM (15 mm x 25 mm), and a 1FF conversion is available for fleets that use the bigger card. Tell us which card type you work with when you order so the slots are set up correctly before dispatch.

Q5. Can it stay switched on around the clock?

Yes — this SMS gateway device is built to sit on a shelf or in a rack and keep running while messages are moving, so a long session counts as normal use. Choose a ventilated, dust-free spot rather than a closed cabinet, and leave space around the chassis so the modules stay cool. Ordinary indoor temperatures are all it needs.

Q6. Do I need internet, a SIM bank or a server to run it?

No — the SIM cards sit inside the chassis and the pool is addressed directly from your PC, so nothing on the sending path has to touch the internet. An enterprise SMS gateway of this kind needs no separate SIM bank and no server: one power lead, one USB cable and a computer are enough.

For detailed product operation, please refer to the relevant manual or contact customer service for assistance

About Us

YX International is a professional supplier specializing in consumer electronics, smart devices, and lifestyle products. With years of experience in global trade and a strong supply chain network, we provide businesses and end-users with reliable products at factory-direct prices.

Our mission is to bridge quality manufacturing with global buyers, making cross-border sourcing easier, faster, and more transparent. From product selection to quality control, and from fast delivery to after-sales support, YX International ensures every order meets high expectations.

        

Why Choose Us

• Extensive Product Range：From smart electronics to innovative gadgets, we cover a wide range of categories to meet various market demands.
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• Dedicated Customer Service：Our professional team is ready to support you before, during, and after your purchase, ensuring your sourcing experience is smooth and hassle-free.