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Home > SMS Dongle > YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access
  • YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
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  • YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access

YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access

SKU:
SMS dongle is a device used for bulk send and receive of SMS on mobile networks.
Built-in wireless 4g module can insert into 1 SIM card.Can be used directly into the computer USB port for laptops and desktops.
(Friendly Reminder: Please indicate the intended country of use when placing your order. Failing such indication, the corresponding frequency band model will be allocated based on the shipping address country)
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  • 4G Model:
    EC25 (Region Specific Global Coverage)
    EC200A (Regional Models Exclude US/CA/JP)
    EC20 (Only India Availability)
  • Optional:
    Only Dongle
    Only Dongle
    Dongle+1FF-2FF Conversion card
    Dongle+1FF-2FF Conversion card
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  • YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
1/1
  • YX 4G LTE Dongle 1 port USB Modem Bulk send SMS High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle EC200A USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • 4G LTE Dongle 1 port USB Wireless Modem Support SMS Text Sending High-Speed Internet access
  • Description
  • Product Details
  • Frequency band
Brand Name YXCALL
PORTS 1
Network 4G LTEInclude GSM, CDMA, WCDMA
Frequency 700-2700Mhz
Sim slot 1
Warranty 12 months
Module EC25/EC200A/EC20 (Please refer to the "Frequency Band" interface for specific information)
Interface Type USB
SMS Send Speed Approximately 3600 SMS per port per hour
Operation System Win all, Linux, android

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

SIM interface

Default is 2FF Mini SIM (15mm*25mm), Optional conversion to 1FF (big size IC card)

Free Software SMS Caster
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 is slower, but includes customs clearance and tax payment, and is delivered directly to the home. The logistics trajectory updates will only be available after the package arrives at customs clearance and is handed over to the local logistics provider.
Payment method Support payment methods such as USDT, PayPal, credit card, TT, etc (Pay with USDT and there are no additional transaction fees, so 3% discount on the product price is given)
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

USB SMS Dongle Box Detail display image


Why Choose This Dongle?
● 1 SIM Slot: Plug in any 4G SIM for instant SMS/internet.
Bulk SMS Pro: Send alerts, promos, or OTPs at 3600 SMS/hour.
4G LTE Speed: Stream, browse, and work without lag.
Free SMS Caster: Schedule, track, and automate campaigns.
Plug & Play: USB-ready for PC/laptop—works in seconds!

 

Advanced Features for Professional Use
Dual SIM Flexibility: Default 2FF Mini SIM slot + optional 1FF IC card converter for legacy SIM compatibility.
Multi-Protocol Mastery: Full support for STK, AT Commands, TCP/IP, SMS/MMS, GPRS, GPS, USSD, and email integration.
GPRS Class 12 Efficiency: High-speed data transfer with CS-1 to CS-4 encoding, HTTP/SMTP/FTP protocols, and PPP/PAP security.


 Enterprise-Ready Reliability

Free SMS Caster: Automate campaigns, track deliveries, and manage templates with user-friendly software.
Military-Grade Security: Encrypted data transmission with RC4 and Base64 protocols for secure operations.
12-Month Warranty: Backed by YXCALL’s technical support, manuals, and global service network.


Key Benefits:

→ Cost Saver: SMS + internet in one device.
→ Global 4G: Supports 700-2700MHz bands in 100+ countries.
→ Developer-Friendly: AT commands for APIs, Python, or IoT.

 

Perfect For:
SMS marketing & customer alerts
Remote teams needing reliable internet
OTP verification & appointment reminders
Startups & cost-conscious SMEs


Tech Specs:

Network: 4G LTE
Ports: 1 SIM slot via USB
Speed: 3600 SMS/hour
OS: Windows, Linux, Android
Warranty: 12 months


Launch in 3 Steps:

1. Insert SIM.
2. Plug into USB.
3. Start Sending and Receiving!

Free Software | Technical support | Compact Design


Need SMS + Internet in one tool?
Includes SMS Caster & EC25/EC200A Modules.
Need Assistance? Contact us for product images, frequency band checks, or bulk order discounts!

Whatsapp: +8615220722893
Emai: yx@yxinternet.com
Telegram: @YXwendy
Teams: yuexun@yx19999.net


Display pictures prepared for various models
For detailed product operation, please refer to the relevant manual or contact customer service for assistance

SMS Caster bulk Send Software Operation Demonstration


1ff-2ff SIM size conversion card
The above picture shows the 1FF-2FF size card conversion adapter (optional)
SIM card tool, which can quickly and easily convert large cards (1FF) into mini SIM cards (2FF)
Convert 15mm * 25mm card size to 54mm * 85mm card size to meet various SIM card needs.

1ff-2ff SIM size conversion card paired with SMS dongle display image

About Us

YxInternet 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, YxInternet 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.

 


FAQ

1.Who are we?

YxInternet is a trusted supplier offering consumer electronics, smart devices, connecting global buyers directly with high-quality factories.

 

2.How can we guarantee quality?

Factory audits to verify production capabilities

Product sampling and testing

Pre-shipment quality checks to confirm product specifications

 

3.What can you buy from us?

We offer a wide range of products, including:

SMS Modem

SMS Dongle

Voip gateway

SMS gateway
eSIM Gateway
IP Phone
Modules/Accessories

Customized products for bulk orders

 

4.Why should you buy from us instead of other suppliers?

Direct factory pricing with no middleman markup

Comprehensive quality control from production to delivery

Flexible order solutions for both retail and wholesale

Fast global shipping and reliable logistics

Dedicated after-sales support to resolve any issues

 

5.What services can we provide?

Product sourcing and customization

OEM and private label support

Product quality inspections

Global shipping coordination

After-sales support and warranty services

1、Overview
SMS dongle is a device used for bulk send and receive of SMS on mobile networks.

Built-in wireless 4g module can insert into 1-8 SIM card.Can be used directly into the computer USB port for laptops and desktops,also be used in conjunction with UART HUB
▼The following picture shows the USB Dongle 4G EC25 module

Note:Because the 4G frequency band is different in different countries or regions, when placing an order, please indicate the country in which the product is used. If there is no indication, we will select the corresponding frequency band model based on the country where the shipping address is located.

2、Product Brief


4G LTE Dongle supports wireless internet access


▼SMS Caster interface operation demonstration




3、Appearance

USB interface
SIM card slot
Uart to USB Switch
LED light
Size:67.5*42*13.7mm



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:Paired with UART, can be use 1/2/3/4/5/6/7/8/9 slots and more

Speed: 2G: 800-1000 sms, 3G:2500-2800 sms, 4G:2500-3600 sms per port per hour Send and receive SMS,MMS
UART ransmitting speed: 9600/19200/115200

SIM interface:Default is 2FF Mini SIM (15mm*25mm), Optional conversion to 1FF (big size IC card)
Working voltage: DC 5V
TTL voltage: DC 3.3V



5、Function

The main function of the product is High-Speed internet access and Internet of Things apply, SMS or voice notification reminders.

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.



About Change IMEI/Send USSD/Call/Put in PIN/PUK code(AT
command)

Change IMEI

1. open Putty

2. click " Serial"
3. Input the com port in "Serial line" such as COM 1

4. PUT IN "at&f"

5. put in "at+cgsn"//check IMEI

6.at+egmr=1,7,"IMEI number" change imei

for example: AT+EGMR=1,7,"453243242432134"

if you put in imei is wrong ,it will reset or keep old IMEI

7. put in "at+cgsn"//check new IMEI


Send USSD

1. open Putty

2. click " Serial"

3. Input the com port in "Serial line" such as COM 1

4. PUT IN "at&f"

5. put in "at+cusd=1,"USSD command""

for example:at+cusd=1,"*097#"

CALL

1. open Putty

2. click " Serial"
3. Input the com port in "Serial line" such as COM 1

4. PUT IN "at&f"

5. put in "ate1"

6. put in "atd number;"

for example:atd 0976006161;

7. put in"ATH" hung off call

Put in PIN/PUK code

1. open Putty

2. click " Serial"
3. Input the com port in "Serial line" such as COM 1

4. PUT IN "at&f"

5. PUT in “at+cpin?” //check PIN status

If display “ready”=> it is ok, don’t need put in PIN code

If display ”SIM PIN” =>need put in PIN code

PUT IN ”at+cpin=PIN code”,
for example:
at+cpin=1234

If display ”SIM PUK” =>need put in PUK code

PUT IN “at+cpin=”PUK code”,”NEW PIN code” ” ,
for example:
at+cpin=”12345678”,”1234”

About UART HUB

If you need to use it in bulks, need to purchase UART HUB with TTL=3.3V. Our store has HUB with 4/8 channels available for purchase.

TTL UART USB2.0 HUB for Raspberry Pi/ Modem/ COM ports, provides more USB capability to your Pi, what's more, it features USB to UART converter for easy serial communication.

It can work with various versions of the Pi, and the size of the board is designed to perfectly fit the Zero / Zero W / Zero WH.

The product adopts 5V input power supply, compatible with USB power supply, and has an output TTL level of 3.3V. It can be directly connected to various GSM 4G LTE MODEMs, DONGLE, and microcontrollers.

USB HUB HAT Features
USB Ports, compatible with USB2.0/1.1
Onboard USB to UART, with enable / disable switch, convenient for Raspberry Pi serial debugging and avoiding conflict

Onboard multi indicators, for monitoring the status of power, USB to UART TTL3.3V COM ports, and each USB port

6、FAQ

Q1. COM and port number is not corresponding, how do I know this port can not use?

A:Each module has lights:

 ● Light flash every 3 s, means normal registration card, can be used;

 ● Light flash every 1 s, it isn’t normal registration card, Need to check the card is installed correctly or not.

Q2. You have installed SIM cards,but device can’t read SIM card.
A:Please re-install SIM card and reboot it port, Installing sim card, the direction of the note card is correct.


Q3. COM port have error 2
A:Please reboot this port or re-install this port(Each module is removable).

Q4. Just began to normal to send, but send failure after a period of time

A:It may be blocked by operator or limit, Check the SIM card again orcontact Operator.


Because the 4G frequency band is different in different countries or regions, when placing an order, please indicate the country in which the product is used. If there is no indication, we will select the corresponding frequency band model based on the country where the shipping address is located.

The EC20/EC200A module and is not suitable for use in the United States, Canada, or Japan. If you need to use it in these countries, Please consult customer service to recommend other 4G modules for you, such as EC25.


Product Feature

Name

4G LTE Dongle Modem

communication interface

USB

Chipset

Quectel EC20 / EC200A / EC25

Function

STK / AT Command / TCP/IP / Data / SMS / IMEI / MMS / Email / GPRS / GPS / USSD

Frequency

EC25-EUX /EC200A-EU:(Asia, Europe,Africa, the Middle East,Southeast Asia, Vietnam, Myanmar, Laos, Cambodia, Malaysia, Singapore, Russia)

​LTE FDD: B1,B3,B5,B7,B8,B20,B28
​LTE TDD: B38,B40,B41
​WCDMA: B1,B5,B8 (900/2100MHz) ​
GSM: B3,B8 (900/1800MHz) ​

EC25-AFX :(United States and Canada)
LTE FDD: B2/B4/B5/B12/B13/B14/B66/B71 ​
WCDMA:B2/B4/B5 (1900,1700,850MHz) ​

EC25-AUX /EC200A-AU:(Australia, New Zealand and Latin America, Mexico, Peru, Colombia, Brazil, Chile, Argentina, Dominican Federation, Venezuela, Honduras, Guatemala, Nicaragua, Costa Rica, Panama, Cuba, Guyana, Bolivia, Paraguay, Uruguay, etc)
LTE FDD: B1/B2/B3/B4/B5/B7/B8/B28/B66 ​
LTE TDD: B40
​WCDMA: B1/B2/B4/B5/B8 (850,900,1700,1900,2100MHz) ​
GSM:B2/B3/B5/B8 (850,900,1800,1900MHz) ​

EC25-J:(Japan)
​LTE FDD: B1/B3/B8/B18/B19/B26
​LTE TDD: B41 ​
WCDMA: B1/B6/B8/B19 ​

EC20 / EC200A-CN:(China, India)
LTE FDD: B1/B3/B5/B8
​LTE TDD: B34/B38/B39/B40/B41
​WCDMA: B1/B5/B8 (900,2100MHz) ​
TD-SCDMA: B34,B39 (900,2100MHz) ​
EVDO CDMA: BC0 (800MHz) ​
GSM: B3,B8: (900,1800MHz)

Operating System

Win all, Linux, android

SIM interface

Default is 2FF Mini SIM (15mm*25mm), Optional conversion to 1FF (big size IC card)

Working voltage

DC 5V

TTL voltage

DC 3.3V

OEM / ODM

Bulk Customization

Warranty

One Year

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