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Home > SMS MODEM > YX 2G 16 Ports GSM Bulk Send SMS Modem IMEI Change Multiple SIM Support Free Software SMS Caster

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YX 2G 16 Ports GSM Bulk Send SMS Modem IMEI Change SIM Pool included SMS Caster Software

Name: YX 2G 16 Ports GSM Bulk Send SMS Modem IMEI Change SIM Pool included SMS Caster Software
Brand: YX SHOP
Price: 154.84 USD
Availability: InStock
Rating: 4.9 (16 reviews)

The sms modem connects to computer via USB interface, Send and receive SMS via the COM port , no network required. 2G 16 port Modem with built-in 2G wireless sms modem M26/M35 modules (Module optional), it supports up to 16 SIM cards for bulk SMS transmission.

● Send and receive bulk SMS with 16 SIM cards at the same time
● Supports IMEI change, USSD and AT command
● Each port has its own power switch – easy to control
● SMS software (SMS Caster) included – easy to use
● Works on 2G networks worldwide (850/900/1800/1900MHz)

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Please select the information you want X

PORTS:

16 ports (SMS)
2G Model:

M26 (2G full frequency)

M35 (2G full frequency)
Price Tier:

1 Unit Price (Tip: Qty 1 | Purchase One)

2+ Units Price (Tip: Min Qty 2 | No Shipment below 2)
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Description
Product Details
Frequency band
Package

Brand Name	YX
PORTS	16
Network	2G GSM
Frequency	850/900/1800/1900 Mhz (Available in all countries where 2G GSM networks are still available) Attention: It is known that "Australia, South Korea, Japan, the United States, and Canada" have shut down 2G and cannot use it
Sim slot	16
Warranty	12 months
Module	M26/M35: 2G full frequency (Certification: CE, FCC, RoHS)
Interface Type	USB
SMS Send Speed	Approximately 1500 SMS per port per hour
Operation System	All Windows, Linux, Android
Power Supply	DC 5V, AC 100-240V
Function	STK / AT Command / TCP/IP / Data / SMS / IMEI / MMS / Email / GPRS / GPS / USSD (Please check the product details)
GPRS protocol	GPRS Multi-slot Classes 1~12(default is Class 12),GPRS format CS-1,CS-2,CS-3,CS-4 PPP/PAP TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING/MQTT
SIM interface	Default is 2FF Mini SIM (15mm*25mm), Optional conversion to 1FF (big size IC card)
Software	SMS Caster/ SMS Deliverer
Support	With instruction manual and technical support (For example, remote technical assistance)
Shipping method	Support DHL, UPS, FEDEX, EMS, 4PX Cainiao standard logistics and dedicated lines (some countries have dedicated lines logistics, Specific consultation with customer service) Tip: (1) Express delivery is faster than dedicated lines, but customers need to handle customs clearance and tax payment, and there will be logistics trajectory updates throughout the process. (2) Dedicated line logistics (DDP) is slower, but includes customs clearance and tax payment, and is delivered directly to the home. Suitable for customers who do not want to handle customs clearance.
Payment method	Support payment methods such as USDT, PayPal, credit card, Bank transfer, etc (Bank transfer only for company payments) Please consult customer service for USDT address,Other payment methods can be redirected to the checkout page for online payment
Ordering Process	Payment for the product you need to order, we will arrange for stock testing after confirming the accuracy of the delivery information with you. We expect to arrange shipment within 2 days and provide you with package picture and logistics tracking number for tracking. Customer service will send message to remind you of tax payment and logistics delivery. If you need technical support after receiving the goods, please leave a message to our customer service personnel, and we will arrange for a technician to assist
Customer service contact information	Whatsapp: +8615220722893 Emai: yx@yxinternet.com Telegram: @YXwendy Teams: yuexun@yx19999.net

Product Overview

The YX 2G GSM 16 Port Industrial SMS Modem is a multi-channel bulk SMS solution built for high-volume SMS services. Adopting industrial-grade hardware design, it is equipped with 16 independent 2G GSM communication ports and 16 standard SIM card slots (1 SIM per port), powered by original Quectel M26/M35 quad-band 2G modules. It supports global GSM 850/900/1800/1900MHz frequency bands, and realizes stable, high-efficiency bulk SMS sending & receiving via USB connection to Windows PC.

This modem perfectly supports SMS Caster E-Marketer and once the sending software is configured the ports go on working unattended, plug-and-play setup, automatic port identification, and complete AT command control. It is widely used in bulk SMS marketing, OTP verification, enterprise alerting, and customer notification scenarios— the kind of hardware you set up once and leave running through the working week.
2G GSM 16 port sms modem Display of Each component

Key Features

Sixteen channels, one connection — each port takes its own SIM card and works independently, greatly improving bulk SMS sending efficiency; up to 1500 SMS per port per hour. So this sms modem behaves like a small pool of units sharing one USB cable.
A power switch per port — take one SIM offline for a top-up or a carrier query without interrupting the other fifteen.
Quectel M26/M35 2G Modules — Built-in original Quectel M26/M35 modules, global quad-band GSM (850/900/1800/1900MHz), stable signal, strong anti-interference, long-term 24/7 operation
Open to your own scripts — every port accepts AT commands, so you can drive USSD balance checks, PIN and PUK configuration, and scripted sending from your own software instead of the bundled tool.
Group sending software included — SMS Caster / SMS Deliverer runs all sixteen ports from one screen, with batch contact import, group management, scheduled and interval sending, auto-prefix, and long or flash SMS options.
Built for long sending sessions — industrial-grade hardware and a USB 2.0 UART interface are made for continuous operation, so a campaign can carry on through the night.

Typical Deployments

SMS marketing campaigns — agencies that send high-volume SMS for promotions, launches and re-engagement can dedicate ports to different client lists, keeping each campaign's sender numbers separate.
Verification codes and OTP traffic — reserve a few channels for one-time codes so a large marketing push never delays a password or login message.
Enterprise alerts — when a server, payment system or production line fails, this high-volume SMS modem pushes the warning to on-call staff straight away instead of waiting for an email to be opened.
Customer notifications — order updates, appointment reminders and service messages go out from named ports, which makes it easier to trace which channel carried a batch if a customer replies.

2G Network Availability

Market	2G GSM status
SIM service needed	An active 2G GSM plan from your carrier
Australia	Shut down — this unit cannot register
South Korea	Shut down — this unit cannot register
Japan	Shut down — this unit cannot register
United States	Shut down — this unit cannot register
Canada	Shut down — this unit cannot register
Other markets	Runs wherever a live 2G GSM network is available; confirm with your carrier before ordering

PC Setup & Driver Installation

Hardware Connection
1. Insert 16 activated SIM cards into the slots correctly, and install 2G GSM antennas for all ports.
2. Connect the modem’s USB port to the PC’s USB port via data cable.
3. Plug in the power adapter (AC 100-240V) and turn on the power switch.
4. Check LED indicators to confirm normal power-on.
Driver Installation
1. Open Device Manager
2. Locate Unknown Device or USB Serial Device (COM).
3. Right-click → Update Driver → Browse my computer for drivers.
4. Select the extracted XR21V1414 driver folder (match 32/64-bit system).
5. Successful installation: Ports display as XR21V1414 USB UART Ch (COMxx).
SMS Caster E-Marketer Installation & Activation
1. Run the SMSCaster setup package and complete installation.
2. Open software → Help → About → Copy Serial#.
3. Send Serial# to our support to get unlock key.
4. Enter unlock key to activate full bulk SMS functions.
Bulk SMS Sending Operation
1. Launch SMSCaster → Click Yes to auto-detect 16 COM ports.
2. Select ports marked Ready for SMS sending.
3. Import contact list (CSV/TXT) or create customer groups.
4. Edit SMS content → Click Send to Outbox.
5. Enter Outbox → Click Send to start bulk SMS delivery.
Advanced AT Command Operation (Putty)
1. Open Putty → Select Serial → Enter COM port & baud rate 115200.
2. Check IMEI: AT+CGSN
3. Modify IMEI: AT+EGMR=1,7,"IMEI_NUMBER"
4. Send USSD: AT+CUSD=1,"*XXXX#"
5. Enter PIN code: AT+CPIN="XXXX"

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
Telegram: @YXwendy
Teams: yuexun@yx19999.net

Why Choose YX 2G GSM 16 Port SMS Modem?

Medium-Scale Bulk SMS Specialized: 16 concurrent channels, perfect for medium-volume commercial SMS campaigns.
Genuine Quectel Modules: Stable signal, higher SMS success rate than ordinary modules.
10-Minute Quick Setup: Complete driver + software + activation guide, no professional debugging needed.
Lifetime Technical Support: Free after-sales service for driver, software, and troubleshooting.
Cost-Effective Bulk SMS Solution: One-time investment, long-term low-cost SMS sending.

FAQ

Q1. Does this modem need an internet connection or a router?

Not at all. This sms modem talks to your computer over USB and sends through the SIM cards' own 2G network on a COM port. There is no broadband line, router or separate gateway to add — the computer, the sending software and the SIM cards are all that is needed.

Q2. Can I run SIM cards from more than one carrier in the same unit?

Yes. Each of the sixteen slots is read independently, so one GSM modem for high-volume texting can carry SIMs from several carriers or plans at once. That is useful when one operator is stronger in a particular region. Keep an eye on the balance and validity of each SIM, since every port runs on its own.

Q3. Can it receive messages, not just send them?

Both directions work. Replies arrive in the same software you use to send text messages, so opt-out requests, confirmations and customer answers land in one inbox instead of being scattered across handsets. You can export the incoming records and pass them to the team that handles follow-up.

Q4. Can I change the IMEI on individual ports?

Yes — identity is set at port level, so you can edit one channel without touching the rest. Change the value while that port is idle, then let it re-register so the sending software reads the new identity on its next connection. Operators running several campaigns often give each SIM its own value and note the original settings so they can be restored later. Check local regulations and carrier terms first, as rules on altering device identity differ by market.

Q5. What do the port indicators tell me?

Every port has its own status light. A flash roughly every three seconds means that channel has registered normally on the network; a port that stays dark usually supports a SIM that needs credit, is not seated properly, or has dropped off the network. Because the lights are per port, you can trace a single problem channel without interrupting the rest.

Q6. Can I run it from Linux or Android instead of Windows?

Windows, Linux and Android are all supported, and the Windows driver installs in a single click. If you plan to run the unit from a particular Linux distribution or an Android host, tell us the platform and version you use and we will confirm the setup before you order.

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.
Direct-from-Manufacturer Pricing：We work directly with reliable factories, ensuring competitive wholesale prices with no hidden costs.
Strict Quality Control：Every product goes through multi-level quality checks, from factory audits to pre-shipment inspections, guaranteeing what you receive matches your expectations.
Efficient Logistics Network：With global shipping partnerships, we offer fast and trackable delivery to over 100 countries, keeping your orders on time.
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.

1、Overview
SMS modem is a type of modem specifically designed for sending and receiving text messages. It can be connected to a computer or other device through a serial interface and send and receive text messages through the GSM network.

They are widely used in various automation systems, remote monitoring, alarm systems, and other fields to achieve remote communication and data tra
nsmission.

2、Product Brief

● For local connection to the computer using the COM port to send SMS, no network required;
● Equipment inserted SIM card and connected to the computer, the computer loaded with COM modem SMS software (this type of software on the market there are also many, the specific function depends on the software, we give our customers free to use SMS Caster), you can send SMS directly through the SMS Caster (The software unlimited hours of usage and unlimited number of ports);
● COM port modem using AT commands to control the modem to send SMS, most of these COM modems are similar, the software can be basically universal, does not support API, If want can develop software yourself.
● Our SMS modem although supports linux, but we do not have driver or software can provide support, so customers need to solve the related support problems, at the same time, for the application of linux, we only provide hardware support for the device and after-sales inspection only check the normal work in the windows system is normal!

3、Appearance

● 8/16/32/64 Ports
● 1 USB Serial Port
● 1 Power Interface (DC 5V,AC 100-240V)
● 1 Power Switch
● 8/16/32/64 Independent switch
● 8/16/32/64 SIM card slots
● 8/16/32/64 Antennas
● 8/16/32/64 LED lights

4、Specification

2G: M26/ M35;
3G:UC20/ UC200T;
4G: EC25/ EC20/ EC200A

GSM: 850/900/1800/1900MHz
3G WCDMA: 850/900/1700/1900/2100MHz
4G LTE: 700-2600MHz

Options：8/16/32/64 x SIM card(big/small) slots

Speed: 2G: 800-1000 sms, 3G:2500-2800 sms, 4G:2500-3600 sms per port per hour Send and receive SMS,MMS

Input voltage: 100 to 240V
Working temperature: -20 to +60 degrees Celsius
Storage temperature: -25 to +70 degrees Celsius
Double tone multi-frequency function(DTMF)

5、Function

1. Directly connect to your computer, the main function depends on the software, such as SMS Caster which we provide for free (you can download it from our website and check the specific function):
● Support batch mass SMS, flash message, long SMS, MMS (need to have their own software support);
● Support importing contacts and importing messages directly (by importing forms);
● Support timed tasks, support auto-reply (need to set keywords);
● Support multi-task sending (send by port), support intermittent sending (you can set how many seconds to lock after sending how many);
● Export unfinished tasks, etc.
2. In addition to SMS-related functions, other features such as call, receive SMS, send USSD, change IMEI, etc. all need to be supported by other software or AT commands.we only provide AT command manual, do not provide other development support.
Remarks: Please check the product manual for other specific functions.

▼SMS Caster interface operation demonstration

6、FAQ
Q1. Does SMS modem support custom calling number/sender ID when making calls or sending text messages?
A：The device uses a SIM card, which naturally displays the SIM card number when making calls or sending text messages. This is determined by the SIM card itself and the SIM card operator, and generally does not support custom calling numbers/sender IDs. In VOIP and network SMS services, only the operator's routing (CLI and direct connection) may be supported!

Q2. Does SMS modem support detecting surrounding mobile phone information, listening to surrounding calls, tracking/tracing mobile phones/calls/SMS, IMSI Catcher and other detection functions?
A：This type of feature has no connection with our product and is not supported!

Q3. Does the SMS modem support wifi or multi wifi functions to provide data internet access and other functions?
A：The functions related to wifi/data internet are not related to any of our devices and are not supported!

Q4. Does GOIP, MOIP, or SMS modem support functions such as MMS, picture SMS, voice SMS, video calls, etc?
A：SMS modems can support MMS (customers need to have their own software support, we do not provide MMS software), and the latest version of YX GOIP/MOIP can also support sending MMS. Other products do not support it.

Q5. Does the modem have an API?

A：The modem does not have an API, while the YX series GOIP/MOIP has HTTP APIs for sending/receiving SMS and USSD, supporting customer developed software to call through HTTP; DBL's GOIP does not have an API that can be directly used, but if the customer has their own server, after installing a GOIP SMS sending server software, they can use the SMS HTTP API.

Q6. Is there a device that supports receiving and forwarding SMS messages?

A：SMS modem can receive SMS messages, but it does not support forwarding. At the same time, the software we provide does not support viewing which port receives SMS messages;YX GOIP/MOIP can receive information and forward it to email/HTTP address/SIP server/other phone numbers or HTTP API directly from the device (commonly used are email or HTTP API retrieval)

Q7. Can the device support international roaming and what should be noted?
A：1. The SIM card needs to be able to roam to the target country. 2. It is necessary to understand the frequency band of the target country, and the device needs to be matched with the frequency band of the target country (if there are too many frequency bands in the target country, it can also be determined which operator in the target country can provide roaming signals for the SIM card, and the device needs to be matched with the frequency band of the operator that provides roaming signals)

Q8. What is the SMS sending speed of the modem?
A：2G modem: 1500 per port per hour; 3G/4G modem: 3600 per port per hour (the above standard testing environment may vary depending on the device environment)

Q9. Modem be used in XX country (or a certain operator)?
A：The product is not related to which country or carrier it is used in. As long as the device's frequency band matches the local (or carrier's) frequency band, it can be used!

Q10. What is the difference between 2G/3G/4G devices?
A: 2G/3G/4G modem send SMS at different speeds, but there is no difference, but in many countries, GSM signal is facing elimination, so you need to choose according to the local situation

Q11. Can the modem send USSD?
A: No, it is not recommended, although the cat can send USSD through AT command, but this AT command relies on manual operation, there is no way to use it in large quantities directly, if the customer has its own software support then it is possible!

About IMEI,operators will recognize that one IMEI is one cell phone, so when the card is abnormal,it may be accompanied by IMEI being blocked, the phenomenon is usually that the device can not be registered or can not send SMS or can not make a call, etc., but the card inserted into the cell phone is normal, this is the case that the IMEI is blocked, and the IMEI can be replaced!

The linked product is a 2G Modem，At present, some countries or regions have closed 2G GSM. Before purchasing, please confirm that still using GSM in your region, otherwise you will not be able to use it.

The countries that have confirmed the cessation of GSM include:Australia, South Korea, Japan, United States, Canada (unable to use)Please contact customer service to recommend 3G or 4G products for you （For example，4G module:EC25）

Product Feature
Name	2G GSM Modem
communication interface	USB
Chipset	Quectel M26/M35 Attention: It is known that "Australia, South Korea, Japan, the United States, and Canada" have shut down 2G and cannot use it
Function	STK / AT Command / TCP/IP / Data / SMS / IMEI / MMS / Email / GPRS / GPS / USSD
GPRS protocol	GPRS Multi-slot Classes 1~12(default is Class 12),GPRS format CS-1,CS-2,CS-3,CS-4 PPP/PAP TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING/MQTT
Frequency	GSM Full frequency: 850,900,1800,1900Mhz (Applicable to global GSM frequency bands)
Operating System	Win all, Linux, android
SIM interface	2FF Mini SIM (15mm*25mm) and 1FF (big size IC card)
Working voltage	DC 5V
TTL voltage	DC 3.3V
OEM / ODM	Bulk Customization
Warranty	One Year