The 64-port GSM modem pool we hold in stock
This is the unit we currently sell from UK stock: a 64-channel, 2G/3G GSM modem pool built for sending and receiving SMS through many SIMs at the same time. Every channel is a complete GSM modem module with its own SIM holder and its own SMA antenna socket. The 64 modules sit in four rows of 16 in a steel desktop chassis, labelled 1-16, 17-32, 33-48 and 49-64 so you can find a channel quickly when you are swapping SIMs or diagnosing a fault.
It is the same class of hardware that is sold elsewhere as a 64 port SMS gateway, a 64 SIM GSM modem or a 64 channel SMS gateway. Those names describe use rather than construction: the box is a modem pool, and paired with SMS software it becomes a gateway. If you have been comparing listings under different names, this is the unit those listings are describing.
How the 64 SIM SMS gateway works
The chassis is organised as two banks of 32 channels. Each bank has a USB-B host port on the front panel; connect both to your computer and the operating system enumerates 64 virtual serial ports, one per modem. Your SMS software opens those ports and talks to each modem with standard AT commands: AT+CMGS to send a message, AT+CMGL to read inbound messages, AT+CSQ to check signal and AT+CREG? to confirm network registration. Because every channel is independent, 64 conversations can be in progress simultaneously, and one SIM being out of credit or out of coverage does not affect the others.
The two USB-A ports beside the host ports allow a second pool to be chained through the first, so a pair of units can share one host connection if you prefer fewer cables. Serial speed is negotiated automatically between 2,400 and 19,200 bit/s, with manual settings from 300 to 115,200 bit/s available through your software.
Each module has its own power switch, so unused channels can be turned off, and modules can be removed individually without powering down the whole chassis. That matters in practice: a pool with 64 SIMs is usually a live service, and being able to lift out one module to change a SIM while the other 63 keep working saves a lot of downtime.
What businesses use a 64-channel pool for
Sixty-four channels is the right size when you have real message volume and want the SIMs, the numbers and the sending logic under your own roof rather than through a third-party API. Typical deployments we see:
- Transactional and service messaging: appointment reminders, order and delivery updates, account alerts and one-time codes sent from your own numbers, with inbound replies landing on the same channels.
- Two-way customer communication: keyword responses, surveys and support conversations that need many concurrent inbound lines.
- Machine-to-machine alerts: collecting status and alarm messages from remote equipment, meters or vehicles, where each channel handles a group of devices.
- Telecoms and software testing: exercising SMS routing, handset firmware or messaging platforms across many simultaneous registrations.
- Broadcasting, events and transport: sectors explicitly recognised in UK government guidance as having legitimate reasons to hold multi-SIM equipment.
It is not sold for unsolicited marketing, account creation at scale, fraud or evading network and platform controls. We decline orders where the stated use does not add up, and we keep supply records as UK law requires. Our lawful use and buyer verification page explains the process.
Hardware layout and physical design
The photographs show the unit as supplied. On the front panel, from left: the illuminated mains rocker switch, the IEC mains inlet, then the USB-B (USB1) and USB-A (USB2) pair for bank one, and the same pair for bank two at the right-hand end. The top plate carries the 64 module slots with their SMA sockets and SIM holders; the SIM slides into each module from the top, so you do not need to open the chassis. Long ventilation grilles run along both sides, and two chrome handles let one person move the unit. Antennas screw onto the SMA sockets; the supplied stub antennas are fine on a desk with reasonable signal, and standard SMA extension leads or higher-gain antennas can be fitted where signal is weak.
Network compatibility and the UK 2G/3G position
The modules are 2G/3G GSM modules. Which of those a SIM actually uses depends on the operator and the country. In the United Kingdom all four networks have now switched off 3G, so a 2G/3G modem pool used in the UK registers on 2G. EE, Vodafone and O2 (and the MVNOs that run on them, such as giffgaff, Tesco Mobile, Lebara and Sky Mobile) have committed to keep 2G running until at least 2029, with a government-agreed final date of 2033. Three has no 2G network, so Three SIMs, and MVNOs on Three such as iD Mobile and SMARTY, will not register on this equipment.
Compatibility notice: 2G/3G network availability is decided by mobile operators and varies by country, region and date. Check that your chosen SIM provider offers 2G (or 3G, outside the UK) service in the locations where the unit will be used before you order SIMs. Our UK network compatibility guide and 2G vs 3G explainer go into more detail.
SMS itself is a 2G-era service and works perfectly well over 2G. Data speed is not relevant to a messaging pool; the 2G channel is used for SMS and the occasional USSD balance check, not for internet access.
Technical specifications
The figures below are taken from the manufacturer's documentation and the unit itself. Where we have not verified a value we say so rather than guess; ask before ordering if a particular figure matters for your deployment. Download the datasheet (PDF).
| Modem channels | 64 independent GSM modem channels (one SIM per channel) |
|---|---|
| SIM slots | 64, one per module; accepts standard and micro SIM sizes |
| Network technology | 2G GSM/GPRS and 3G. Bands per module: confirmed on request before dispatch |
| Host interface | USB 2.0. Two USB-B host ports (one per 32-channel bank) plus two USB-A ports for chaining a second unit |
| Control | Standard AT commands over virtual serial ports; every channel appears as its own COM/tty port |
| Operating systems | Windows and Linux hosts |
| Serial speed | 300 to 115,200 bit/s; automatic baud detection 2,400 to 19,200 bit/s |
| Antenna | 64 SMA connectors, one per channel; stub antennas supplied |
| Modules | Individually removable modem modules with a separate power switch for each channel |
| Power | 100 to 240 V AC mains input, IEC inlet; approx. 60 W consumption |
| Operating temperature | -20 °C to +55 °C (storage -25 °C to +70 °C) |
| Chassis | Steel desktop chassis with side ventilation and two carry handles, banks labelled 1-16, 17-32, 33-48, 49-64 |
| Dimensions and weight | Confirmed on request (boxed weight advised with your dispatch email) |
What's included
- 64-port GSM modem pool chassis with 64 modem modules fitted
- GSM stub antennas (SMA)
- Mains power lead
- USB cable
SIM cards are not included. The mains lead supplied is shown in the manufacturer photographs; if your unit ships with a two-pin lead we include a UK adapter or UK lead so it plugs straight in.
Software, drivers and support
The pool presents standard USB serial devices, so it works with any SMS server or script that speaks AT commands on Windows or Linux. Common choices include Gammu and Gammu-SMSD, Kannel, playSMS, and commercial SMS server products that support multi-modem pools; your own software using pySerial, Node SerialPort or similar libraries works too. We supply the USB driver details and a quick-start sheet with the unit, and our USB setup guide walks through first connection, port enumeration and the first AT commands. Email support is included; see the support page.
Other names for this product
You may see this hardware listed as: 64 port SMS gateway, 64 SIM GSM modem, 64 SIM SMS gateway, 64 channel GSM modem, 64 channel SMS gateway, 64 port GSM gateway, bulk SMS modem pool. They all describe a 64-channel GSM modem pool used for SMS. If a listing elsewhere quotes 4G or LTE, check the module specification carefully; the unit on this page is a 2G/3G model and we describe it as such.
Compared with the 8, 16 and 32-port models
The smaller pools in the range are 2G GSM units made to order with a 3 to 5 week lead time. The table shows how the 64-port unit compares on price and capacity; per channel it is by far the best value, and it is the only 2G/3G unit.
| Model | Channels | Price | Per channel | Availability |
|---|---|---|---|---|
| 8-Port 2G GSM Modem Pool | 8 | £305 | £38.12 | To order, 3 to 5 weeks |
| 16-Port 2G GSM Modem Pool | 16 | £545 | £34.06 | To order, 3 to 5 weeks |
| 32-Port 2G GSM Modem Pool | 32 | £1,040 | £32.50 | To order, 3 to 5 weeks |
| 64-Port 2G/3G GSM Modem Pool | 64 | £449 | £7.01 | In UK stock |
Full comparison of the four sizes
Lawful-use notice
A 64-SIM device is a "SIM farm" as defined by the Crime and Policing Act 2026. From 29 October 2026 it is an offence in the UK to possess one without good reason or lawful authority, and suppliers must take reasonable steps to verify buyers and record each supply. Legitimate uses include business communications, broadcasting, transport, electronic communications networks, testing and freight tracking. At checkout we ask for your organisation, a registration number where you have one, and a short description of intended use; we check company numbers against Companies House and retain the record. Read the full lawful-use policy.
Delivery, returns and warranty
UK mainland tracked delivery is included in the price. Orders are usually dispatched within one working day of payment and arrive in one to three working days. Non-mainland UK, Ireland and international delivery is quoted on request. The unit is covered by a 12-month return-to-base warranty against manufacturing defects. Consumers may cancel within 14 days of delivery under the Consumer Contracts Regulations 2013. See delivery and returns and warranty for the detail.
See a 64-port unit in use
The video below, published by a third-party reseller, shows a unit of this type being set up and used. It gives a good sense of the physical size and the SIM and antenna fitting process. It is not our video and we do not endorse every claim made in it; features such as IMEI changing are not something we support or recommend, and altering an IMEI is an offence in the UK.
