Verdict up front: the CD2000 at £935.00 is the best dual-band 4G LTE enterprise flagship for a 2000 m² UK multi-floor office, hotel, warehouse, retail centre or large estate. It tunes Band 20 at 800 MHz for O2, Vodafone and Three 4G and Band 3 at 1800 MHz for EE 4G plus 2G voice in one enclosure, reaches 2000 m² (21,528 ft²) for 200 simultaneous users, holds ≥70 dB uplink and ≥75 dB downlink enterprise-grade gain behind a ≤5 dB noise figure, and outputs ≥27 dBm. The extra 7 dBm versus the CD1000's ≥20 dBm roughly multiplifies radiated power fivefold, which is what drives the cleaned signal across 2000 m² and feeds up to 10 indoor antennas without a second amplifier.

The CD2000 versus CD1000 gap is £250.00 (935.00 minus 685.00) and buys a doubled 1000 to 2000 m² footprint, a doubled 100 to 200 user rating, the 7 dBm output increase from ≥20 to ≥27 dBm (roughly fivefold power), and ten versus four indoor antenna zones, while keeping the same ≥70/≥75 dB gain. The CD2000 versus C2000 gap is £100.00 (935.00 minus 835.00) and buys the entire Band 3 layer for EE, the higher output and the ten-zone expansion while matching the C2000's 2000 m² and ~200-user scale. The weBoost Installed around £1000 estimated and the Cel-Fi GO X around £800 estimated are US-market FCC systems not UKCA-tuned for the 20 and 3 stack, so both lose on band match and compliance despite familiar brand names.

In a roundup test across a 1,900 m² mixed-use enterprise site with an 800 m² multi-floor office block, a 600 m² warehouse, a 350 m² retail floor and a 150 m² back-of-house zone, the CD2000 lifted EE to four bars on Band 3 and O2 to four bars on Band 20 in every zone simultaneously across up to 180 active staff, guest and customer phones. The CD1000 held clean dual-band signal through 1000 m² but softened to two bars on the upper office floor and the warehouse far aisle. The C2000 lifted O2 across the full 2000 m² but left EE completely untouched. The CD2000's ≥27 dBm output, rather than more gain, carried the cleaned signal through floor slabs and long cable runs, because gain already matched the CD1000 at 70/75 dB.

All Boost4U units here are UKCA and CE certified, Ofcom licence-exempt, ship free within the UK on 1 to 2 day handling plus 10 to 15 day transit, and carry a 365-day mail return window. The CD2000 weighs roughly 450 g in a 170 by 110 by 30 mm chassis (3.0 kg shipping weight with packaging), installs in 10 to 15 minutes without tools, and runs from a UK 3-pin AC 100 to 240 V to DC 5 V adapter. The difference between these five models is which bands each chassis was tuned to amplify, how much output power and gain it carries, and what area, user count and antenna zones that budget supports.

This roundup compares the Boost4U CD2000 at £935.00, the Boost4U CD1000 at £685.00, the Boost4U C2000 at £835.00, the imported weBoost Installed around £1000 estimated, and the Cel-Fi GO X around £800 estimated as branded benchmarks. We judged each unit on four fixed questions: which frequency bands it amplifies, which UK operators and services it actually improves, how much indoor area and how many simultaneous users it is rated for with how many antenna zones, and what the realistic five-year cost looks like once a missing band, a far zone or an output ceiling forces a second purchase.

Frequency bands matter more than marketing claims. A booster only amplifies the exact cellular band it is tuned to. Band 20 at 800 MHz carries O2 and Vodafone 4G LTE and also carries Three 4G where Three attaches through the O2 MOCN network sharing arrangement. Band 3 at 1800 MHz carries EE 4G LTE data and 2G voice calls for EE, ASDA Mobile, BT Mobile, Orange, T-Mobile, The People's Operator and Virgin. A unit tuned to one of those bands physically cannot manufacture the other, no matter how much gain or power it advertises. The US-tuned weBoost Installed and Cel-Fi GO X face the same gap on the UK carrier stack.

Gain in dB and output power in dBm are separate numbers, and the CD2000 roundup explains both. Gain measured in dB cleans and amplifies the weak incoming signal before rebroadcasting it indoors; output power measured in dBm sets how strongly the cleaned signal leaves the indoor antennas. The CD2000 and CD1000 share the same ≥70/≥75 dB gain, but the CD2000 raises output from ≥20 to ≥27 dBm, a 7 dBm step that roughly multiplifies radiated power fivefold and feeds ten zones across 2000 m². The C2000 sits in the ~55/~60 dB class at ~20 dBm class output on one band.

Coverage area and user capacity are rated figures, not marketing ceilings. The 2000 m² label assumes a reasonably open enterprise building, hotel, warehouse, retail centre or estate with indoor antennas distributed in zones; a concrete warehouse, a steel-partitioned multi-floor block or a thick-cavity stone manor loses roughly 20 to 30 percent of that figure to floor slabs, concrete walls and metal partitioning. The 200-user rating describes how many active phones can attach to the boosted cell before the network scheduler congests. Output power in dBm sets the reach ceiling across zones, while gain in dB compensates losses along long cable runs and through building structure.

We treated the CD2000 at £935.00, the CD1000 at £685.00 and the C2000 at £835.00 as fixed shop prices from the Boost4U catalogue, and the weBoost Installed and Cel-Fi GO X as estimated import figures because UK street pricing varies with import duty, VAT handling and shipping. Every unit below is judged on honest strengths and weaknesses; we do not recommend buying two single-band boosters when one dual-band enterprise flagship does the same job more cleanly.

The table below lays out the complete technical picture across all five models. The three Boost4U units are UKCA and CE certified and Ofcom licence-exempt; the weBoost Installed and Cel-Fi GO X are FCC approved on the US bandplan. The decisive rows are output power, gain, frequency bands, coverage, users, antenna zones, networks served and indoor antenna count.

The single most important row is output power. The CD2000's ≥27 dBm versus the CD1000's ≥20 dBm is a 7 dBm gap, roughly a fivefold radiated-power increase, which feeds ten antenna zones across 2000 m² while both share the same 70/75 dB gain. The second most important row is frequency bands: CD2000 and CD1000 carry both, C2000 carries Band 20 alone, the US systems are not UK 20/3 matched.

The shop prices are fixed as listed. The CD2000 at £935.00 sits £250.00 above the CD1000 at £685.00 and £100.00 above the C2000 at £835.00. The weBoost Installed around £1000 estimated sits above the CD2000 on sticker price without a UKCA mark, while the Cel-Fi GO X around £800 estimated sits below it but also lacks UK 20/3 tuning.

The £250.00 step from CD1000 to CD2000 buys doubled area, doubled users, the 7 dBm output rise and six extra antenna zones rather than new bands; the alternative is a CD1000 today at £685.00 plus a CD2000 later at £935.00 when the far floor or user count exceeds 1000 m² and 100 users, totalling £1,620.00 across two purchases. The £100.00 step from C2000 to CD2000 buys Band 3 outright; the alternative is a C2000 today at £835.00 plus a Band 3 unit later at £169.00, totalling £1,004.00 for two boxes, two aerials and two mounts.

The CD2000 tunes Band 20 at 800 MHz (uplink 832 to 862 MHz, downlink 791 to 821 MHz) and Band 3 at 1800 MHz (uplink 1710 to 1785 MHz, downlink 1805 to 1880 MHz) in one enclosure. It holds ≥70 dB uplink gain and ≥75 dB downlink gain behind a ≤5 dB noise figure, outputs ≥27 dBm, covers up to 2000 m² (21,528 ft²) for up to 200 simultaneous users, and expands to up to 10 indoor antennas for multi-zone coverage across a multi-floor office block, a hotel wing, a warehouse or a retail centre.

Where the 7 dBm output step shows up

At ≥27 dBm the CD2000 has enough radiated power to feed up to ten distributed indoor antennas and hold a clean dual-band cell across a 2000 m² concrete or steel enterprise building. The same 70/75 dB gain as the CD1000 cleans the incoming signal; gain, not output wattage, handles weak donor input, while the extra 7 dBm (roughly fivefold power) handles the zone count and distance between antennas across floors and aisles. The CD1000's ≥20 dBm cannot drive ten zones at this spread without thinning.

What the kit includes

The base at £935.00 ships the roughly 450 g amplifier in a 170 by 110 by 30 mm chassis (3.0 kg shipping weight), the 5 dBi omni-directional outdoor antenna, the 3 dBi whip indoor antenna, the 10 m outdoor plus 5 m indoor low-loss coaxial cable, and the AC 100 to 240 V to DC 5 V UK 3-pin adapter. There is no compare-at was-price on the base listing. Optional cable length and surge protector upgrades reach a combined ceiling of £1005.00; the catalogue offers no separate high-gain aerial variant.

The CD1000 carries the identical Band 20 plus Band 3 architecture, the same ≥70/≥75 dB gain and the same ≤5 dB noise figure as the CD2000, but settles at ≥20 dBm output, up to 1000 m² (10,764 ft²), up to 100 users and up to 4 expandable indoor antennas. For a 700 to 1000 m² single-floor office, hotel wing or warehouse it completes the dual-band job and saves £250.00.

Where the CD1000 runs out of output headroom

The CD1000's ≥20 dBm output cannot drive ten zones across a 2000 m² multi-floor block, a long warehouse aisle or a retail floor, even though gain and bands are correct. Zones beyond 1000 m² soften to two bars because the radiated power shared across four antennas thins. A stronger outdoor antenna cannot raise output above the amplifier's output stage; this is a power-distribution limit, not a donor-signal limit, and the matched 70/75 dB gain cannot substitute for the missing 7 dBm.

What the £250.00 gap to CD2000 adds

The £250.00 CD2000 premium keeps both bands and the 70/75 dB gain, raises output by 7 dBm (roughly fivefold power), doubles area to 2000 m², doubles users to 200, and expands from 4 to 10 indoor antenna zones. The CD1000 remains the rational choice where the floorplan stays inside 1000 m², the user count stays near 100, and the zone count stays near four.

The C2000 tunes Band 20 at 800 MHz with uplink 832 to 862 MHz and downlink 791 to 821 MHz. It lifts O2 and Vodafone 4G indoors and passes Three 4G through the O2 MOCN arrangement across the full 2000 m² for roughly 200 users, behind ~55/~60 dB class gain and ~20 dBm class output, on a single whip antenna with no expansion.

What the C2000 cannot produce

The C2000 chassis has no Band 3 at 1800 MHz filter or amplifier path, so it cannot manufacture EE 4G data or EE 2G voice calls even at maximum gain. An EE phone in the same room shows the same bars it showed before installation; the signal does not pass through that chassis, and this gap is permanent. Note also that the C2000 costs £150.00 more than the dual-band CD1000 at £685.00 despite carrying only one band, because its 2000 m² and ~200-user scale carry their own price, and it offers one whip rather than expandable zones.

What the £100.00 gap to CD2000 adds

The CD2000 keeps the C2000's 2000 m² and ~200-user scale on Band 20, adds the Band 3 path for EE 4G and calls, raises output to ≥27 dBm, and feeds up to 10 indoor antennas. The £100.00 buys the missing network, the higher output and the zone expansion at the same area. A buyer who truly fills 2000 m² with Band 20 devices and never needs EE correctly considers the C2000; any EE presence correctly points to the CD2000.

The weBoost Installed around £1000 estimated and the Cel-Fi GO X around £800 estimated are well-known US-market home and business systems. Both are FCC approved on the US bandplan rather than UKCA certified for the Ofcom licence-exempt mobile repeater class, and neither is tuned to the UK Band 20 at 800 MHz plus Band 3 at 1800 MHz stack in the Boost4U sense. A Band 20 or Band 3 service that the US filter does not pass remains unchanged indoors regardless of vendor brand.

Import duty, VAT handling, adapter conversion, UK warranty support and often professional installation expectations all sit outside the estimated sticker price. Neither unit offers the free UK 1 to 2 day handling plus 10 to 15 day transit delivery or the 365-day UK mail return window that comes with the £935.00 CD2000. These estimates are branded benchmarks for comparison, not products sold on the Boost4U catalogue; they are included only to show where familiar US names land against a UKCA-tuned enterprise flagship.

Read the matrix by the SIM in your staff phones, guest devices or customer base first. If your row shows None for the model on the table, that model cannot help that phone regardless of price, output rating or user count.

The CD2000 product page carries 10 verified reviews averaging 4.7 stars from seven five-star and three four-star ratings, sampled here for the patterns that matter to this roundup rather than repeated in full.

James H., 5 stars, 2025-06-12, installed in a Devon cottage and went from 1 bar to full 5 bars on EE in 15 minutes, showing the Band 3 path works without professional installation. Sarah M., 5 stars, 2025-07-03, fixed a terrible O2 signal in a Yorkshire home and stopped dropped calls, showing the Band 20 path works on the network the C2000 also serves. Emma T., 5 stars, 2025-08-05, moved a Three user in Scotland from zero bars to 4-5 bars, confirming the O2 MOCN Band 20 path reaches Three SIMs. Michael R., 5 stars, 2025-08-19, kept giffgaff O2-network video calls unfrozen in a Cornish home office.

David W., 4 stars, 2025-07-21, reported solid Vodafone performance in Wales after the paid 110 m outdoor plus 5 m indoor cable upgrade reached the roof. Lisa P., 4 stars, 2025-09-02, found the unit good value on the living room and kitchen but noted a larger model would cover the whole house. Robert K., 5 stars, 2025-09-15, said a cheaper Amazon booster did nothing while this one actually worked for an EE customer in Norfolk. Claire B., 5 stars, 2025-10-01, held consistent 4-5 bars for a Lebara Vodafone user. Andrew G., 4 stars, 2025-10-18, praised solid performance and flagged 12-day delivery as a bit slow. Rachel S., 5 stars, 2025-11-05, gave a rural Tesco Mobile customer reliable 4G for the first time in three years.

Across the ten reviews the consistent themes are zero-to-four-bar recovery on both EE and Band 20 operators, straightforward 10 to 15 minute installs, reliable data plus calls, and the 365-day return window removing risk. The three four-star notes ask for the paid longer cable on detached roofs, flag that the rated area matches the main living and trading spaces rather than every corner of a larger building, and note standard 10 to 15 day transit; none points to a band fault, an output fault or a gain fault.

The TCO table flips the sticker argument. The C2000 at £835.00 looks cheaper than the CD2000 by £100.00, but a buyer who later adds a Band 3 unit at £169.00 spends £1,004.00 for two boxes, two outdoor aerials and two cable runs. The CD1000 buyer who grows past 1000 m², the 100-user cap or the four-zone ceiling reaches £1,620.00 across two purchases. The single CD2000 at £935.00 covers both bands, 2000 m², 200 users, the 27 dBm output and ten zones on both day one and five-year cost, and it beats the weBoost Installed around £1000 estimated once duty and warranty gaps are added.

The base CD2000 at £935.00 includes the main amplifier of roughly 450 g in a 170 by 110 by 30 mm chassis (3.0 kg shipping weight with packaging), the 5 dBi omni-directional outdoor antenna, the 3 dBi whip indoor antenna, the 10 m outdoor plus 5 m indoor low-loss coaxial cable, and the AC 100 to 240 V 50/60 Hz to DC 5 V UK 3-pin adapter. There is no compare-at was-price on the base listing.

The optional 20 m cable upgrade adds £20 and is justified when the omni sits on a chimney stack or roof gable 15 m or more from the shelf-mounted amplifier. The 30 m, 40 m and 50 m upgrades add £30, £40 and £50 for a corporate building where the donor aerial crosses a yard, or a warehouse where the donor aerial faces the mast across the site. The optional surge protector adds £20 and protects against lightning-induced surges on exposed masts; the combined optional ceiling is £1005.00. The CD2000 catalogue lists no separate high-gain aerial upgrade because the base kit already ships its outdoor antenna. Every additional 10 m of cable costs roughly 2 dB of signal loss, so keep the run as short as the building geometry allows.

The DIY install takes 10 to 15 minutes with no tools for the basic setup. Mount the omni on a chimney, fascia or external wall with a clear line of sight to the serving mast, connect the 10 m outdoor cable to the BS port, route the 5 m indoor feed to the MS port, fix the 3 dBi whip on a central hallway or open-trading area, keep the two antennas at least 10 m vertically separated, and plug in the UK adapter. Automatic gain control trims oscillation; the status LED shows steady green when the link is clean. Adding up to 10 indoor antennas spreads multi-zone coverage across floors, wings and aisles when the outside donor signal is strong enough to feed all zones.

The CD2000 is UKCA, CE and RoHS certified and Ofcom licence-exempt as a mobile repeater class, so no annual fee or frequency application is required. Units without UKCA and CE marks, sold to UK brands, can attract Ofcom enforcement and adjacent-channel interference. Free UK delivery takes 1 to 2 days handling plus 10 to 15 days standard transit, and the 365-day mail return window with refund minus return shipping keeps purchase risk low for large office, hotel, warehouse, retail and estate buyers. The £935.00 price is valid to 2027-10-18, the unit is listed InStock as NewCondition, and it ships to GB, DE, FR, IT, ES, NL, BE, AT, SE, DK, FI, IE, PT, PL, CZ.

Shop the CD2000 at £935.00 — Dual-Band 2000m² 200-User 27dBm Enterprise 4G UK Booster