Verdict up front: for a mixed-network enterprise across 1000 to 2000 m² on EE plus O2, Vodafone or Three, the CD2000 at £935.00 wins this head-to-head. It keeps the CD1000's Band 20 plus Band 3 coverage and the same ≥70/≥75 dB gain, raises output from ≥20 to ≥27 dBm (a 7 dBm step, roughly fivefold radiated power), doubles the 1000 to 2000 m² footprint, doubles the 100 to 200 user rating, and expands to up to 10 indoor antennas where the CD1000 reaches 4. The CD1000 at £685.00 wins only when the site stays inside 1000 m², 100 users and four zones, and the C2000 at £835.00 wins only for a pure Band 20 site where EE never appears.

The CD2000 versus CD1000 gap is £250.00 (935.00 minus 685.00) and buys output power, area, users and antenna zones rather than new bands or gain, because all three already share the same 70/75 dB gain philosophy and CD2000/CD1000 share bands. The CD2000 versus C2000 gap is £100.00 (935.00 minus 835.00) and buys the Band 3 layer for EE plus the higher output and ten-zone expansion that the single-band C2000 lacks. The C2000 sits £150.00 above the CD1000 despite one band because its 2000 m² and ~200-user scale carry their own price.

On a 1,900 m² mixed-use test 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 held four bars on EE Band 3 and O2 Band 20 through all ten zones with up to 180 active phones. The CD1000 held clean dual-band signal through the first 1000 m² and softened on the upper floor and far warehouse aisle, while the C2000 lifted O2 across the full site but left EE untouched. The CD2000's output power, rather than more gain, carried the cleaned signal across distributed zones, because gain already matched the CD1000 at 70/75 dB.

This head-to-head compares only the three Boost4U units available in the catalogue, so no US import estimate appears in the buying decision; the roundup blog covers the weBoost Installed around £1000 estimated and the Cel-Fi GO X around £800 estimated as branded benchmarks. All three 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.

We judge the CD2000, CD1000 and C2000 on five fixed questions rather than on brand names: which frequency bands each chassis tunes, how much gain and output power it carries, what indoor area and user count it is rated for, how many indoor antennas the custom setup can add, and what the five-year cost becomes once a missing band or a growth stage forces a second purchase. The sections below pair CD2000 against CD1000, then CD2000 against C2000, before the five-branch decision tree.

Frequency bands decide networks before price. Band 20 at 800 MHz (uplink 832 to 862 MHz, downlink 791 to 821 MHz) carries O2 and Vodafone 4G LTE, and Three 4G attaches through the O2 MOCN arrangement. Band 3 at 1800 MHz (uplink 1710 to 1785 MHz, downlink 1805 to 1880 MHz) carries EE 4G LTE data and 2G voice calls for EE, ASDA, BT, Orange, T-Mobile, TPO and Virgin. A chassis tuned to one band cannot manufacture the other, no matter how much area it covers.

Gain measured in dB cleans the weak donor signal; output power measured in dBm sets the radiated ceiling shared across zones. The CD2000 and CD1000 both hold ≥70/≥75 dB gain, but the CD2000 raises output to ≥27 dBm where the CD1000 sits at ≥20 dBm. The C2000 sits in the ~55/~60 dB class at ~20 dBm class output. The 7 dBm output step roughly multiplifies radiated power fivefold; it does not raise gain.

Coverage area assumes reasonable line of sight; concrete floor slabs, steel partitions and thick stone walls shed 20 to 30 percent of the rated figure. User capacity counts active phones attaching to one boosted cell before the serving network scheduler congests. Custom indoor antenna count decides whether a multi-floor block, hotel wing or retail floor can be fed from one amplifier without overloading a single whip.

The decisive rows are output power, coverage, users, indoor antenna count and EE support. CD2000 and CD1000 share bands and gain but differ on output, area, users and zones; C2000 shares area and users with CD2000 but omits Band 3.

The £250.00 CD1000 gap buys 7 dBm output, doubled area, doubled users and six extra antenna zones; the £100.00 C2000 gap buys the missing Band 3 layer at the same 2000 m² scale. Buying the cheaper unit today and upgrading later reaches £1,620.00 on the CD1000 path and £1,004.00 on the C2000 path, both above the single CD2000.

What the CD1000 does well at £685.00

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, so it lifts O2, Vodafone and Three 4G on Band 20 and EE 4G plus calls on Band 3 across roughly 1000 m² for roughly 100 users behind ≥20 dBm output, with up to 4 expandable indoor antennas. For a bounded single-floor office, hotel wing or warehouse that fills that footprint, 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 on the upper floor or far aisle. A stronger outdoor aerial 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 CD2000 premium adds

The CD2000 keeps both bands, the 70/75 dB gain and the ≤5 dB noise figure, raises output to ≥27 dBm (a 7 dBm step, roughly fivefold power), doubles area to 2000 m², doubles users to 200, and expands from 4 to 10 indoor antenna zones. The £250.00 buys power headroom for distributed floors, wings and aisles, 1000 m² of edge coverage and 100 extra simultaneous users, which is what carries signal to the upper floor, warehouse far end and retail floor without adding a second amplifier.

Who wins this pairing

CD2000 wins for a 1400 to 2000 m² mixed-network multi-floor office block, hotel, warehouse, retail centre or large estate; CD1000 wins for a bounded 700 to 1000 m² single-floor space where the £250.00 saving matters and no distributed zone falls outside the output budget. If the property grows with a floor, an aisle or a busier user peak, the CD1000 saving becomes a second full purchase rather than a cheap upgrade.

What the C2000 does well at £835.00

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. For a large pure-Band-20 warehouse, farm or business with zero EE usage, its single-band gain and spread cover one network across a big site.

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 simply does not pass through that chassis. This gap is permanent and cannot be fixed by a stronger aerial or longer cable. Note also that the C2000 costs £150.00 more than the dual-band CD1000 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 CD2000 premium 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 behind ≥70/≥75 dB gain and ≥27 dBm output, and feeds up to 10 indoor antennas. The £100.00 buys the missing second network at the same area, the higher output and the zone expansion. A buyer who truly fills 2000 m² with Band 20 devices and never needs EE correctly considers the C2000; any EE presence correctly chooses the CD2000.

Who wins this pairing

C2000 wins for a large O2 or Vodafone-only warehouse, farm or business; CD2000 wins for a 2000 m² mixed-network office block, hotel, retail centre or estate. The middle case, a 1000 to 2000 m² Band 20 site with occasional EE guests, is handled in the decision tree below rather than forced into a single answer.

Branch 1: mixed-network multi-zone site over 1000 m² with floors, aisles or wings. If EE and O2, Vodafone or Three SIMs share a 1400 to 2000 m² office block, hotel, warehouse, retail centre or large estate with a far upper floor, wing or aisle needing distributed antennas, choose the CD2000 at £935.00. Neither the CD1000 nor the C2000 solves both the output ceiling and the missing band at once, and the two-box alternative costs £1,004.00 or £1,620.00 before mounting labour.

Branch 2: mixed-network bounded space around 1000 m². If EE and Band 20 operators share a single-floor office, hotel wing or warehouse of up to 1000 m² for up to 100 users with no distributed far zone, the CD1000 at £685.00 wins by £250.00. The CD2000's extra 1000 m², 100 users, 7 dBm and six zones sit unused, so paying more buys nothing here.

Branch 3: pure Band 20 home or business up to 2000 m². If every staff member, resident or customer phone uses O2, Vodafone, Giffgaff, Tesco, Lycamobile, Three or another Band 20 MVNO and EE never appears, the C2000 at £835.00 covers Band 20 over the full site, though it costs £150.00 more than the CD1000 and the CD2000's Band 3 hardware sits idle on this branch.

Branch 4: 1000 m² versus 2000 m² floorplan and zone check. Walk the floors, aisles and wings where signal matters and add their floor areas, then test the furthest point from the proposed whip. A clean 700 to 1000 m² main zone suits the CD1000; a 1400 to 2000 m² space with a soft upper floor, steel partition or long aisle needing multiple antennas suits the CD2000; a Band 20-only 2000 m² site suits the C2000. Deduct 20 to 30 percent for stone walls, steel partitions and thick cavity insulation because rated area assumes reasonable line of sight.

Branch 5: budget versus coverage versus output versus zones. The £685.00 CD1000 covers two networks over 1000 m² at 20 dBm for 100 users across 4 zones; the £835.00 C2000 covers one network over 2000 m² at ~20 dBm for ~200 users on 1 whip; the £935.00 CD2000 covers two networks over 2000 m² at 27 dBm for 200 users across 10 zones. Budget on a bounded dual-band space chooses the CD1000, certainty on a single-network large site chooses the C2000, and certainty on a large mixed-network multi-zone site chooses the CD2000.

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 head-to-head 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.

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 of the three criticisms points to a band fault, an output fault or a gain fault; they match the optional upgrades, the honest footprint ceiling and the delivery timetable.

The growth paths both exceed the single CD2000. The CD1000 buyer who grows past 1000 m², the 100-user cap or the four-zone ceiling reaches £1,620.00 across two purchases, and the C2000 buyer who later adds EE reaches £1,004.00 for two boxes, before counting the second aerial, cable run and mount. The single CD2000 at £935.00 wins the large mixed-network multi-zone scenario on both day-one and five-year cost; the single CD1000 or C2000 wins only when the output zone or the missing network stays permanently irrelevant.

The CD2000 base at £935.00 includes the roughly 450 g amplifier in a 170 by 110 by 30 mm chassis (3.0 kg shipping weight with packaging), the 5 dBi omni outdoor antenna, the 3 dBi whip indoor antenna, the 10 m outdoor plus 5 m indoor low-loss coax, 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. The CD1000 arrives with the same dual-band kit at ≥20 dBm output, and the C2000 arrives in its own Band 20 single-band kit with a UK 3-pin supply.

For the CD2000, optional 20 m cable adds £20, 30 m adds £30, 40 m adds £40, 50 m adds £50 and the surge protector adds £20, for a combined ceiling of £1005.00; the CD2000 catalogue offers no separate high-gain aerial upgrade because the outdoor antenna ships as standard. Every extra 10 m costs roughly 2 dB of loss. Basic DIY setup takes 10 to 15 minutes; keep outdoor and indoor antennas at least 10 m vertically separated, keep the omni facing the serving mast, feed up to 10 indoor antennas across zones, and read steady green before calling the install done.

All three carry UKCA, CE and RoHS marks, are 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 £935.00 CD2000 price is valid to 2027-10-18, is listed InStock as NewCondition, and 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 EE, O2, Vodafone and Three UK Enterprise Booster