Short answer: yes, a GSM modem pool works in the UK, on 2G. All four UK networks have switched off 3G, and EE, Vodafone and O2 will keep 2G running until at least 2029 (2033 at the latest), so a 2G or 2G/3G pool with EE, Vodafone or O2 SIMs registers and sends SMS normally. Three has no 2G network, so Three SIMs do not work. From 29 October 2026 you also need a good reason or lawful authority to possess a device that uses five or more SIMs, under the Crime and Policing Act 2026.
UK network compatibility
All four UK mobile networks have switched off 3G. A 2G/3G modem pool used in the UK therefore registers on 2G, which is fine for SMS. EE, Vodafone and Virgin Media O2 continue to run 2G and have told Ofcom they will begin switching it off from May 2029 (EE), summer 2029 (O2) and during 2030 (Vodafone), with all UK 2G gone by 2033 at the latest. Three has no 2G network at all.
The practical rule: use SIMs from EE, Vodafone or O2, or from MVNOs that run on them (giffgaff, Tesco Mobile, Sky Mobile, Lebara, VOXI, Talkmobile, 1pMobile, Lyca, BT Mobile, Plusnet). Do not use Three, iD Mobile or SMARTY SIMs; they will not register. Our 2G vs 3G guide has the operator table.
Signal matters more for a pool than for a phone, because 64 modules share one location. Indoors in a comms cabinet, expect to use SMA extension leads to bring antennas to a window or a wall-mounted multi-antenna array. The supplied stub antennas are adequate where signal is reasonable.
Choosing SIMs and tariffs
Consumer tariffs typically forbid automated, machine or bulk sending in their fair-use terms, and operators do enforce this. For a modem pool, use business or IoT/M2M SIMs whose terms cover your use, and stay within any per-SIM daily limits your software can enforce. Sixty-four SIMs on a business account is a normal order for an operator's business team; explaining that they are for a modem pool used for notifications, telemetry or testing is usually all that is asked.
Standard and micro SIM sizes fit the modules on our units. Keep a record of which SIM (ICCID and number) is in which channel; good SMS software does this for you.
The Crime and Policing Act 2026 and multi-SIM devices
Sections 151 to 153 of the Crime and Policing Act 2026 create two offences that come into force on 29 October 2026:
- Possessing a SIM farm without good reason or lawful authority. A SIM farm is any device capable of using five or more SIMs at once or interchangeably to make calls or send messages. Every modem pool we sell meets that definition.
- Supplying a SIM farm unless the supplier (a) supplies in the course of business, (b) takes reasonable steps to verify that the recipient will have good reason or lawful authority, and (c) records the date, a description of the device, the recipient's name, registration number and addresses, and the verification steps taken.
The Act and the Home Office guidance recognise legitimate uses including broadcasting and programme making, public transport operations, electronic communications networks, freight tracking, testing and public safety, and make clear that other genuine business reasons also count. What the law targets is the use of SIM farms for scam texts and fraud.
What this means for buyers: you should be able to explain, and if asked evidence, why your organisation holds the equipment. Keep the purchase record, your SIM contracts and a short written statement of purpose together. What it means for us: we ask every buyer for their organisation details, a registration number where one exists, and a description of intended use; we check company numbers against Companies House; and we retain the record. The full process is set out on our lawful use and buyer verification page.
Messaging law that applies whatever hardware you use
The modem pool is only the transport; the content and recipients are governed by other rules. Marketing messages to individuals need consent under PECR and must identify the sender and offer an opt-out. Personal data in your message logs falls under UK GDPR. Sender identity must not be spoofed. Operators' terms restrict automated sending on consumer SIMs. None of this is unique to modem pools, but a 64-channel unit makes it easy to send a lot of messages quickly, so the compliance side deserves the same care as the technical side.
Network switch-off dates and legislation on this page were last checked against Ofcom and legislation.gov.uk on 28 September 2026.
Buying from UK stock
Our 64-port unit ships from the UK on a tracked, signed-for service, with UK mainland delivery included in the price. That avoids import duty, VAT-on-import surprises and the two to four week lead time of ordering direct from the Far East, and it means UK consumer and business protections apply to the sale. See delivery and returns and warranty.