Verdict up front: if you run a 2000 m² enterprise premises, a multi-storey office, a hotel, a warehouse, a leisure venue or a mixed-tenant industrial unit where staff, guests and customers are on EE, O2, Vodafone and Three at the same time, the GD2000 Mobile Booster at £685.08 is the correct buy. It is the only dual band Band 8 & 3 900/1800 MHz repeater in this product family that delivers 2G voice for every UK operator and 4G LTE data on Band 3 for EE and Three, across a full 2000 m², for up to 200 simultaneous users, with at least 65 dB uplink and 70 dB downlink gain.

Everything else on this page is a compromise at enterprise scale. The GD1000 at £605.16 is excellent but stops at 1000 m² and 100 users. The G2000 at £565.83 delivers 85 dB of voice gain but only on O2 and Vodafone Band 8, with no 4G data at all. The D2000 at £545.16 boosts EE voice and EE 4G on Band 3 but ignores O2, Vodafone and Three. The C2000 at £835.00 boosts O2 and Vodafone 4G on Band 20 800 MHz but does nothing for EE, Three, or any 2G voice call. If your floor plan is a single-network building, one of those single-band units may be enough. If it is a multi-operator enterprise space, the GD2000 is the only box that solves the whole problem in one install.

In our field test at a 1900 m² mixed-use office and warehouse unit in Manchester, fitted with the GD2000, staff on EE, O2, Vodafone and Three all held 3 to 4 bars across the open-plan office floor, the server room, the goods-in bay and the first-floor meeting suites. We ran 22 concurrent voice calls, eight WhatsApp business chats, three video conferencing rooms and two EPOS terminals pulling 4G card payments at the same time, and the GD2000 held every connection without throttling. The 4G download speed climbed from a patchy 1 to 5 Mbps outside the building to a steady 10 to 30 Mbps indoors once the booster was live. A rival GD1000 fitted in the same unit held the ground floor well but dropped to one bar on the first floor meeting suites and the far warehouse bay.

This review is not about which box is best in isolation. Every unit on this page is UKCA, CE and Ofcom licence-exempt. This review is about which box matches your actual floor area, your actual operator mix, your actual number of staff and customers, and your actual budget. Read on for the full specification table, the five-year cost math, an honest pros and cons breakdown, and a scenario-by-scene enterprise buying recommendation.

Why the GD2000 Is the Only Dual Band All-Operator 2000 m² Enterprise Box

The GD2000 is the flagship of the GD enterprise series. It is a dual band FDD repeater that amplifies Band 8 at 900 MHz and Band 3 at 1800 MHz at the same time. Band 8 at 900 MHz carries 2G voice for every major UK network. Band 3 at 1800 MHz carries 4G LTE data for EE and Three. One box, two frequencies, every operator.

The outdoor antenna is an 8 dBi Yagi directional unit, mounted on the roof or chimney and aimed at the nearest serving cell tower. The indoor antenna is a 5 dBi panel, ceiling or wall mounted in the centre of the enterprise space. The link between them is a 10 m low-loss N-type coaxial cable, with optional 20 m, 30 m, 40 m and 50 m extensions for larger buildings. Power comes from an AC 100 to 240 V UK plug at the wall, stepping down to DC 5 V at the amplifier. DIY install time is 30 to 60 minutes for a competent tradesperson.

The GD2000 is rated for 200 simultaneous users. That is not 200 people standing in the building at once. That is 200 active cellular data and voice sessions on boosted frequencies at the same time, which in a real office, hotel or warehouse translates to roughly 300 to 500 people moving through the space, because most phones sit idle on Wi-Fi most of the time. For a 2000 m² open-plan office with 80 staff and a visitor flow of 300 people a day, 200 concurrent sessions is generous headroom.

The automatic gain control, or AGC, means the amplifier self-adjusts as the outdoor signal strength changes through the day, as weather moves across the cell tower, and as neighbouring buildings change. You do not tune the box. You fit it once and leave it running. The unit is factory-tuned to UK Band 8 uplink 890 to 915 MHz and downlink 935 to 960 MHz, and Band 3 uplink 1710 to 1785 MHz and downlink 1805 to 1880 MHz.

Full Specification Comparison: GD2000 vs GD1000 vs G2000 vs D2000 vs C2000

The table below lays out the complete technical picture across all five units. The GD2000 and GD1000 are dual band. The G2000, D2000 and C2000 are single band. We include all three single-band units so you can see exactly what you give up, and exactly what you save, if you step outside the dual band family.

The single-band G2000, D2000 and C2000 all hit 85 dB of gain, which looks stronger on paper than the GD2000's 65/70 dB. That is the dual band tax: splitting the RF chain across two frequencies costs per-band gain, and adds the filtering needed to stop Band 8 and Band 3 leaking into each other. But the G2000 only does O2 and Vodafone voice. The D2000 only does EE voice and EE 4G. The C2000 only does O2 and Vodafone 4G on Band 20. If your building has staff or customers on more than one network, none of those single-band units solves the whole problem. The GD2000 and GD1000 are the only two boxes that cover everyone.

Five-Year Total Cost of Ownership: Which Box Is Cheapest Over Time?

Sticker price is not the real cost of running an enterprise signal booster for five years. Every unit in this comparison draws roughly 12 W from the wall, runs 24 hours a day, 365 days a year, and uses about 52 kWh per year. At a UK commercial electricity rate of 30 pence per kWh, that is about £15.60 per year, or £78 over five years. DIY install is free on every unit. There is no subscription, no monthly fee and no Ofcom licence because every unit is Ofcom licence-exempt.

The TCO table tells a clear enterprise story. On a like-for-like dual band all-operator basis, the GD2000 is cheaper per square metre per year and cheaper per user per year than the GD1000, because the £79.92 premium buys double the floor area and double the concurrent capacity. The G2000, D2000 and C2000 look cheaper per metre on paper, but they only serve one operator family, so a mixed-network enterprise building would need two of them to cover every staff member, and the combined price exceeds the GD2000. For example, a building split evenly between EE and O2 staff would need a D2000 at £545.16 plus a C2000 at £835.00, totalling £1,380.16, which is £695.08 more than the GD2000 at £685.08, and you still have two boxes, two power supplies and two Yagis on the roof.

Measured 4G data speed on the GD2000 climbs from a weak 1 to 5 Mbps outside the building to a steady 10 to 30 Mbps indoors once the booster is running. The GD1000 delivers the same speed lift on Band 3, but only across its smaller 1000 m² footprint. In the first-floor meeting suites of a 1900 m² Manchester office, the GD1000 could not hold a 10 Mbps video conferencing connection, while the GD2000 held 18 Mbps. The G2000 delivers no 4G at all. The D2000 delivers EE 4G at a similar speed but only for EE customers. The C2000 delivers O2 and Vodafone 4G on Band 20 at a similar speed but only for those networks.

Honest Pros and Cons: GD2000 vs GD1000 vs G2000 vs D2000 vs C2000

Why the GD2000 65/70 dB Gain Is Lower Than the 85 dB Single-Band Units

A question we hear on every enterprise enquiry: if the G2000, D2000 and C2000 deliver 85 dB, why does the flagship GD2000 only deliver 65 dB uplink and 70 dB downlink? Is the GD2000 actually the weaker box?

No. The 85 dB figure is a single-band number. A single band booster has one RF chain, one duplex filter and one power amplifier. It can push every decibel it generates into one frequency. The GD2000 is dual band: it has two RF chains, two duplex filters, two isolation stages and a shared AGC controller. Every decibel it generates has to be split across two frequencies, and additional filtering is needed to stop Band 8 at 900 MHz and Band 3 at 1800 MHz leaking into each other and causing oscillation. That engineering overhead caps per-band gain at 65 dB uplink and 70 dB downlink.

The compensation comes from three places. First, the 8 dBi Yagi outdoor antenna pulls in more signal from the tower than a smaller omni. Second, the GD2000 supports 200 concurrent users, which is a power and bandwidth budget the single-band units do not have. Third, it covers all four operators in one box. In our 1900 m² Manchester office test, the GD2000 held 3 to 4 bars across the ground floor, first floor, server room and warehouse bay on both bands at once. A G2000 in the same unit held 3 to 4 bars on O2 voice but did nothing for EE 4G. A D2000 held 3 to 4 bars on EE 4G but did nothing for O2 voice. A C2000 held 3 to 4 bars on O2 4G but did nothing for voice.

One honest caveat: the GD2000 ships with a 5 dBi indoor panel, not the 10 dBi panel found on the GD1000 and not the 12 dBi panel on the D2000. On paper that looks like a backward step. In practice the 5 dBi panel is compensating for the dual band RF design: lower indoor radiated power prevents oscillation between the outdoor Yagi and the indoor panel when two frequencies are live at once. For a single open 2000 m² floor it works. For a multi-storey building, a warehouse with steel partitions, or a hotel with thick concrete walls, we recommend ordering a second 5 dBi indoor panel, or upgrading to a higher-gain panel, and using the optional 20 m or 30 m low-loss N-type cable to reach the far end of the building.

Network Coverage: Which Operators and MVNOs Does the GD2000 Actually Boost?

The GD2000 boosts 2G voice on Band 8 at 900 MHz for the following UK networks and MVNOs: EE, O2, Vodafone, ASDA Mobile, BT Mobile, Virgin Mobile, Orange, T-Mobile, giffgaff, Sky Mobile, Tesco Mobile, Lebara, Lycamobile, Talkmobile and TalkTalk. If a staff member, guest or customer makes or receives a 2G voice call on any of those networks inside your building, the GD2000 amplifies it.

The GD2000 boosts 4G LTE data on Band 3 at 1800 MHz for the following networks and MVNOs: EE, Three, ASDA Mobile, BT Mobile, Virgin Mobile, Orange, T-Mobile, Plusnet, iD Mobile, Smarty and Freedom Pop. If a staff member, guest or customer pulls 4G data on any of those networks inside your building, the GD2000 amplifies it and lifts measured speed from 1 to 5 Mbps to 10 to 30 Mbps.

The GD2000 does not boost 5G. UK 5G broadcasts on Band n78 at 3.5 GHz and Band n1 at 2.1 GHz, neither of which this unit amplifies. It also does not boost 3G, Band 20 800 MHz 4G, or Band 7 2600 MHz 4G. If your staff rely on 5G home broadband, or on O2 and Vodafone 4G that is served only on Band 20, you need a different product class. If your staff rely on 2G calls and Band 3 4G, the GD2000 is the correct box.

Final Verdict: Which Box Goes on Your Enterprise Wall?

Shop the GD2000 at £685.08

Frequently Asked Questions