The YX SMS modem pool runs 8, 16, 32 or 64 SIM cards at once from a single USB connection to a Windows, Linux or Android machine, with EC25, EC200A or EC20 modules chosen at order time. This guide compares every build option in one place — port count, radio module, power adapter and price tier — so you can land on the right configuration before you buy. Buyers searching for a 4g lte modem usually need the 4G builds described below, while the older gsm modem label describes the same SIM-slot hardware under its legacy name. Confirm the port count first, then the module for your region.
Almost every support question on this hardware starts with the wrong category. Split them apart first, and the remaining decisions are only port count, module and plug.
Multi-port SMS chassis, single-SIM sticks and voice gateways all get sold under the same loose vocabulary. The four descriptions below cover what this site's range actually contains, so you can tell which one your project needs before you look at a single specification.
A chassis holding 8, 16, 32 or 64 SIM slots, each slot with its own 4G module and its own power switch. It links to a PC over USB and sends SMS through a COM port.
Typical buyer: SMS aggregators and enterprise messaging teams sending at volume.
The legacy name for SIM-slot SMS hardware. It is applied loosely to both 2G and 4G units, so treat it as a category rather than a specification.
Typical buyer: procurement staff searching by the older term who still need to confirm the network generation.
A SIM-to-VoIP bridge built for call traffic rather than text, with SIP channels as the primary output.
Typical buyer: voice-termination operators who measure success in concurrent calls, not messages.
A single-SIM modem in stick form, built on EC25 or EC200A modules, supporting SMS text sending and high-speed internet access.
Typical buyer: field engineers and developers who need one SIM online for testing or a laptop connection.
Everything the product page confirms about the 8/16/32/64-port pool, in one place.
| Product | YX 4G LTE 8/16/32/64 ports SMS Modem Pool Bulk Send SMS IMEI Change AT Command |
| Port options | 8 ports · 16 ports · 32 ports · 64 ports (SIM slots, selected before purchase) |
| Built-in 4G module | EC25 / EC200A / EC20 — module is optional and selected at order time |
| Simultaneous capacity | Up to 8, 16, 32 or 64 SIM cards sending and receiving SMS at the same time |
| Host connection | USB interface to the computer; SMS is sent and received over the COM port |
| Network requirement | No network connection is required to run the SMS software |
| Included software | SMS Caster (SMS software) included |
| Command support | IMEI change, USSD and AT command |
| Port control | Individual power switch on each port |
| Operating systems | Windows, Linux or Android |
| Power adapter | EU · CN/AU · CN · US · UK (selected at order time) |
| Price tier | 1 Unit Price, or 2+ Units Price (minimum quantity 2 under that tier) |
| SKU | No SKU value is displayed on the product page |
Frequency-band values are not published on the product page. Confirm the bands your carrier uses before ordering.
The module determines where the modem pool will work. It is the single choice most likely to cause an exchange, so make it before you check out.
Listed as region-specific global coverage. Confirm the exact bands with your carrier for the country of deployment.
Regional models exclude the United States, Canada and Japan. Suited to supported European and Asian markets.
Supports India, Russia and parts of Europe and Asia — a useful middle option for those markets.
| Adapter option | Choose it when |
|---|---|
| EU | Your rack or office uses European two-pin sockets. |
| CN/AU | You deploy in China or Australia on the combined plug type. |
| CN | You deploy in mainland China on the standard local socket. |
| US | You deploy in North America on the two-blade plug. |
| UK | You deploy in the United Kingdom or Ireland on the three-pin plug. |
The adapter is a separate selection from the module. Both are chosen on the same product page before you add the item to your cart.
Port count is the one specification you cannot change after delivery. The table below turns the stated per-port rate into a capacity picture for each build.
| Build | Concurrent SIM slots | Stated per-port rate | Continuous 24-hour ceiling | Best fit |
|---|---|---|---|---|
| 8 ports | 8 | ~3,600 SMS/hour | ~691,200 SMS | Pilots and small, targeted campaigns |
| 16 ports | 16 | ~3,600 SMS/hour | ~1,382,400 SMS | Growing teams moving off single-SIM devices |
| 32 ports | 32 | ~3,600 SMS/hour | ~2,764,800 SMS | Established senders with steady daily traffic |
| 64 ports | 64 | ~3,600 SMS/hour | ~5,529,600 SMS | Maximum density from one USB connection and one chassis |
The approximately 3,600 SMS per port per hour figure is the rate stated for this modem pool. The 24-hour ceilings are simple arithmetic on continuous full-load operation and are not a guarantee of delivered traffic — carrier filtering, message length, SIM plans and software settings all reduce real output. Size your build by peak concurrent SIM requirement, not by the ceiling.
What the pool can do once it is on your bench, and what each capability means for day-to-day operations.
Deployments rarely stop at one chassis. If you are rolling out several sites, ordering mixed port counts, or need a specific module and plug combination confirmed before purchase, talk to the team before you check out — it is cheaper than an exchange.
Keep adjacent product options together for a faster catalog comparison.
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View producta modem pool is a multi-port chassis — 8, 16, 32 or 64 sim slots — with a 4g module in each port, controlled from a pc over usb. “gsm modem” is the older, looser term for the same kind of sim-slot sms hardware; it does not tell you the network generation. always confirm the module and network generation before ordering.
match the port count to your peak concurrent sim requirement. eight ports suits pilots and small campaigns, 16 and 32 suit growing senders, and 64 ports gives the highest density from a single usb connection and a single chassis.
ec25 is listed as region-specific global coverage. ec200a regional models exclude the united states, canada and japan. ec20 supports india, russia and parts of europe and asia. the product page does not publish frequency-band values, so confirm the bands your carrier uses before ordering.
no. the modem pool connects to a computer over usb and sends and receives sms through the com port. the included sms caster software runs on windows, linux or android.
sms caster is included with the modem pool, so there is no separate software purchase. it works alongside imei change, ussd and at command support on the same device.
yes. imei change, ussd and at command control are all listed features of the pool. each port also has its own power switch, so a single port can be restarted without taking the chassis offline.
