YX 4G LTE 16 Ports Bulk Send SMS Modem IMEI Change SMS Caster

Key Features

• Sixteen SIM slots in one chassis: Run sixteen SIM cards side by side instead of stacking sixteen single-SIM phones on a shelf; one USB cable and one power point replace the whole stack.
• Per-port power switches: Take a single port out of rotation for a top-up or a carrier query without interrupting the ports that are still working through the list.
• IMEI change on demand: When a carrier starts limiting a number, adjust the device identity and keep the same SIM and the same schedule running.
• Send and receive on every port: The unit behaves like a standard gsm modem in both directions, so replies, opt-out requests and delivery reports arrive on the port the message left from.
• Built for long daily runs: The chassis is designed to stay powered through a full day of high-volume sms service traffic, with no rebuilding of drivers or settings between campaigns.
•  Zero Monthly Fees: Only pay for SIM cards—no subscriptions.
• Global 4G Support: 700-2700MHz bands for 100+ countries.  

Network & Module Options

Three module options let you line the unit up with the networks you actually use. EC25 covers the widest spread of global bands, EC20 suits India, Russia and parts of Europe and Asia, and EC200A is built for regional networks and is not intended for the US, Canada or Japan. Choosing between them changes which carriers will accept your SIMs, not the way the chassis works: the same sms gateway footprint, the same SMS Caster dashboard and the same AT command handling. Tell us your country and carriers before you order and we will confirm which module to ship.

Applications

• Campaign and marketing sends: Agencies and in-house teams keep several client campaigns running at once, with each port on its own SIM and its own schedule.
• OTP and verification traffic: One-time codes go out and confirmations come back on the same port, which keeps login and checkout flows tidy during peak sign-up hours.
• Alerts and notifications: When you have to send a large batch of messages at short notice, the SIM pool lets a delay notice or service update go out across many numbers at the same time.
• Enterprise broadcasting: Organisations that push announcements through a single enterprise sms gateway can house the sixteen-port unit in one comms rack and manage it from one machine.
• IoT and device messaging: Meters, trackers and remote terminals can be tied to their own ports so their status messages stay easy to trace and separate from marketing traffic.

Setup & Daily Operation

1. Load the SIM cards into the slots and make sure each one has an active plan with your carrier.
2. Connect the unit to your computer with the USB cable and wait for the new ports to be detected.
3. Install the driver if your operating system asks for it; the sms gateway then shows up as one COM port per SIM.
4. Open SMS Caster, import your contact list and decide which ports carry which part of the send.
5. Start the campaign from the dashboard and watch delivery reports arrive in the same window.
6. Log replies and opt-outs from the inbound folder so the list is clean for the next run.

Technical Support & Model Matching

Every modem we ship includes 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.
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