Answer up front: if your multi-floor office, hotel, warehouse, large retail unit or farm estate runs O2 or Vodafone SIMs and needs 4G data plus boosted 2G voice calls across a 2000m² footprint for up to 200 simultaneous users, the CG2000 at £935.00 is the pick; it pairs Band 20 at 800 MHz data with Band 8 at 900 MHz calls, cleans the donor at ≥70 dB uplink and ≥75 dB downlink gain, outputs ≥27 dBm (seven dB, roughly five times the CG1000's ≥20 dBm), feeds up to 10 indoor antennas, and includes the high-gain Yagi in the full kit. If you only need a 1000m² single-floor commercial site for 100 users and can save £250.00, the CG1000 at £685.00 carries the same Band 20+8 stack at ≥70/75 dB with 4 antennas. If your business SIMs are EE-led and you want EE data plus EE calls rather than O2/Vodafone voice, the CD2000 at £935.00 swaps Band 8 for Band 3 at the same gain, size, output, Yagi and 10 antennas.

The £250.00 CG2000-vs-CG1000 gap (935.00 minus 685.00) buys +1000m² (doubling the footprint), +100 users (doubling the count), +7 dBm output (≥27 vs ≥20, ≈5x power), and +6 indoor antennas (10 versus 4), while gain stays ≥70/75 dB and the bands stay Band 20+8. The £0.00 CG2000-vs-CD2000 gap buys different operators rather than more machine: same 2000m², same 200 users, same ≥70/75 dB, same ≥27 dBm, same Yagi, same 10 antennas, but the CD2000's Band 3 at 1800 MHz serves EE voice while the CG2000's Band 8 at 900 MHz serves O2/Vodafone voice. No single unit boosts EE calls and O2/Vodafone calls together, because those two call layers live on different bands this chassis family does not combine.

This page compares the three Boost4U chassis side by side rather than in a roundup: the CG2000, the CG1000 and the CD2000. It separates the data layer on Band 20 (shared by all three) from the voice layer (Band 8 on the two CG units, Band 3 on the CD unit), sizes the output power, footprint, user and antenna difference between CG2000 and CG1000, and gives a five-branch decision tree so the choice follows which SIMs you hold, how big the site is, how many devices attach, whether the Yagi matters, and whether budget or coverage decides.

All three 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. None carries 3G Band 1 at 2100 MHz or 5G; all run from an AC 100–240V to DC 5V UK 3-pin adapter. The rest of this page numbers every gap in pounds, dBm, square metres, users and antennas before you order.

Before the tables, three rules keep the comparison honest. First, Band 20 at 800 MHz (uplink 832–862 MHz, downlink 791–821 MHz) is shared by all three and carries O2, Vodafone and Three 4G data, so data capability is not the deciding factor; the deciding factor is which voice band the chassis amplifies. Second, the CG2000 and CG1000 share Band 8 at 900 MHz (uplink 890–915 MHz, downlink 935–960 MHz) for O2/Vodafone 2G calls and SMS; the CD2000 instead tunes Band 3 at 1800 MHz for EE 2G calls. Third, between the two CG units, gain matches at ≥70/75 dB and only output power, area, users and antenna count differ, so the CG1000 question is purely "do I need 2000m², 200 users, ≥27 dBm and 10 antennas today or later?"

Output power matters more than sticker price for a large multi-floor spread. The CG2000's ≥27 dBm drives the cleaned signal across 2000m² and 10 whips, while the CG1000's ≥20 dBm holds a 1000m² zone for 100 users through 4 whips; the +7 dB gap is roughly five times the transmit power, not a louder tone but a reachable signal across floors, metal and concrete to more antennas and zones. Gain matches at ≥70/75 dB, so raising output rather than gain is the engineering choice for doubled spread and a larger device count.

Coverage figures assume reasonable donor signal outside and 10m vertical separation between the outdoor omni/Yagi and indoor whip; a weak rural or metal-clad donor at −97 to −105 dBm uses the CG2000's included Yagi aimed at the nearest mast, while the CG1000 also includes its own Yagi; a strong donor at −70 to −90 dBm lets both units add extra indoor antennas via splitter and extra cable, up to 10 on the CG2000 and 4 on the CG1000. The tables below compare specs, price gaps and day-one versus five-year cost before the decision tree.

Read the voice rows before the price rows: both CG units boost O2/Vodafone calls, only CD2000 boosts EE calls, and all three boost O2/Vodafone/Three 4G data on the shared Band 20; then read output, coverage, users and antennas, where CG2000 and CD2000 share ≥27 dBm, 2000m², 200 users and 10 antennas, and CG1000 sits at ≥20 dBm, 1000m², 100 users and 4 antennas.

The £250.00 CG1000 saving buys smaller area, fewer users, lower output and six fewer antennas, not a different network; the £0.00 CD2000 tie changes only the voice operator. Neither gap buys more data speed, because Band 20 data is identical across all three chassis.

The CG2000 and CG1000 tune the identical two bands: Band 20 at 800 MHz for O2, Vodafone and Three 4G data, and Band 8 at 900 MHz for O2/Vodafone 2G voice calls and SMS, and they share the same ≥70 dB uplink and ≥75 dB downlink gain and ≤5 dB noise figure. If both sit in a single broad room, they look the same because the shared donor, Band 20 data and Band 8 voice work on either chassis. The difference appears as the site doubles and spans floors: the CG2000 raises output from ≥20 to ≥27 dBm (+7 dB, roughly five times the transmit power), spreads the cleaned signal across 2000m² for 200 users through 10 indoor antennas, where the CG1000 holds a 1000m² cell for 100 users through 4 antennas.

The +£250.00 line item by line item

For £250.00 (935.00 minus 685.00), the CG2000 adds: +1000m² of rated indoor area (2000 versus 1000, exactly double); +100 simultaneous users (200 versus 100, exactly double); +7 dBm output (≥27 versus ≥20, ≈5x transmit power); and +6 indoor antennas (10 versus 4). Gain, bands, noise figure, 3 dBi whip family, included Yagi, and the 10m outdoor plus 5m indoor cable stack are matched.

Where the CG1000 still wins

The CG1000 at £685.00 wins on entry price by £250.00 and is the honest choice for a single-floor office, a mid-size hotel floor, a warehouse zone or a large retail area where the boosted signal reaches 1000m² and active devices stay at 100 or fewer. In that footprint the doubled 2000m², 200 users, ≥27 dBm and 10 antennas are unused capacity, and the lower price plus the same Band 20+8 data-and-calls path makes the CG1000 the value pick.

Where the CG2000 becomes unavoidable

Once the layout is a multi-floor corporate HQ, a resort or conference hotel, a large warehouse or distribution centre, a 200-device supermarket floor, or a spread farm estate, the CG1000's ≥20 dBm, 1000m² and 100-user rating thins beyond the fourth antenna. The CG2000's ≥27 dBm drives the doubled spread across 10 whips for separate floors and zones without buying a new box; the included Yagi handles a weak donor without a separate aerial purchase. Buying CG1000 now and CG2000 later costs 685.00 plus 935.00 rather than choosing the CG2000 once for a 2000m² layout.

The CG2000 and CD2000 are a £0.00 tie on upfront price, area (2000m²), users (200), gain (≥70/75 dB), output power (≥27 dBm), antenna count (10) and the included Yagi; even the 10m outdoor plus 5m indoor cable stack matches. The whole difference is the voice band the chassis amplifies, because both share Band 20 for O2/Vodafone/Three 4G data.

CG2000 Band 8: O2 and Vodafone calls

The CG2000 tunes Band 8 at 900 MHz (uplink 890–915 MHz, downlink 935–960 MHz). On O2 and Vodafone SIMs this boosts 2G voice calls and SMS indoors, and 900 MHz also reaches deeper through masonry, metal and concrete than higher bands. MVNOs on the O2 network (giffgaff, Sky Mobile, Talkmobile, Lycamobile, Tesco) and on Vodafone (Lebara 2G, TalkTalk 2G) ride this same call layer. EE receives Band 20 4G data only; the CG2000 does not tune EE's Band 3 voice.

CD2000 Band 3: EE data and calls

The CD2000 tunes Band 3 at 1800 MHz instead, which carries EE 4G data and EE 2G voice. An EE-led business gets boosted EE calls that the CG2000 cannot provide; in return, O2 and Vodafone SIMs receive Band 20 data only, with the call channel left native on 2G rather than boosted. The CD2000 cannot add Band 8 later, and the CG2000 cannot add Band 3 later; these are fixed voice layers, not switchable modules.

The £0.00 tie decides by SIM, not by spec

Because price, area, users, gain, output, antennas and the Yagi are identical, the CG2000-versus-CD2000 choice is a pure operator question: O2/Vodafone-led business with calls = CG2000; EE-led business with calls = CD2000; mixed where EE voice and O2/Vodafone voice both matter = no single chassis solves both, and a second band-specific unit or a larger multi-band distributed system is required rather than forcing one box.

Walk the branches top to bottom and stop at the first yes.

Branch 1 — Are your main business SIMs O2 or Vodafone (incl. giffgaff, Sky, Talkmobile, Lycamobile, Tesco, Lebara, TalkTalk) and do calls drop indoors?

Yes on both: the Band 8 call layer matters, so stay inside the CG family. Move to Branch 2 for size, output and device count; do not pick the CD2000, which leaves these calls native.

Branch 2 — Is the site 1000m² or smaller (single-floor office, mid hotel floor, one warehouse zone), active devices 100 or fewer, and budget the deciding factor?

Yes: CG1000 at £685.00, Band 20+8, ≥70/75dB, ≥20dBm, 4 antennas, save £250.00. No (multi-floor HQ, resort, conference hotel, distribution centre, 200-device retail floor, farm estate, 101–200 active devices, or spread beyond 4 antennas needing high output): CG2000 at £935.00, 2000m², 200 users, ≥27dBm, 10 antennas, Yagi included.

Branch 3 — Are the main business SIMs EE-led and does EE voice drop indoors while O2/Vodafone appear only as data?

Yes: CD2000 at £935.00, Band 20+3, EE data and calls across 2000m² for 200 users at ≥27dBm with Yagi included and 10 antennas. Do not reach for the CG2000 because it never boosts EE Band 3 voice.

Branch 4 — Do you need both EE boosted calls AND O2/Vodafone boosted calls in one site?

Yes: none of the three chassis covers both voice layers; plan a band-specific second unit or a larger multi-band distributed system rather than overloading a single box. No: return to Branch 1 or 3.

Branch 5 — Is the site a high-rise tower, many buildings beyond 10 antennas, 3G Band 1, or 5G?

Yes: a single 2000m² chassis is undersized or band-wrong; choose a larger multi-antenna or multi-band commercial system. No and the zone fits 2000m²: return to Branch 1, 2 or 3 and order the matched unit.

Day one, CG2000 and CD2000 tie at £935.00 and CG1000 sits at £685.00. The five-year total separates them when a second purchase appears.

The CG1000 buyer who expands later pays 685.00 plus a 2000m² chassis before six extra antennas, splitter, cable run and install; the CD2000 buyer who later adds an O2/Vodafone call layer pays a Band 8 unit on top of the 935.00 already spent. Only the correctly matched single CG2000 or CD2000 closes the job day one at £935.00. The £250.00 CG1000 saving evaporates when growth forces the second box.

The CG2000 box at £935.00 holds the ~450 g amplifier (170×110×30 mm, 3.0 kg shipping), the 5 dBi omni outdoor aerial, the included high-gain Yagi, the 3 dBi whip indoor antenna, the 10m outdoor low-loss coax, the separate 5m indoor coax, and the AC 100–240V 50/60Hz to DC 5V UK 3-pin adapter; there is no paid external-aerial variant because the Yagi already comes in the full kit. Optional: 20m (+£20), 30m (+£30), 40m (+£40), 50m (+£50) cable; protector (+£20); max optional combo £1005.00. The CG1000 box carries the same cable stack at ≥20dBm with 4 antennas and an included Yagi; the CD2000 box matches the CG2000 cable stack, gain and included Yagi for its EE job.

Basic setup takes 10 to 15 minutes without tools: fix the omni or the aimed Yagi outside with a clear mast view, keep the indoor whip at least 10 m vertical below, run the outdoor and indoor coax, power from the UK 3-pin adapter, and read steady green before testing. Strong donor at −70 to −90 dBm permits up to 10 indoor antennas on the CG2000 (4 on the CG1000) via a multi-way splitter and extra cable; weak donor at −97 to −105 dBm uses the included Yagi aimed at the mast before any cable upgrade. The custom note reads "Expandable coverage by adding indoor antenna, splitter, cable if the outside signal is strong."

All three carry UKCA, CE and RoHS, are Ofcom licence-exempt, ship free within the UK (handling 1–2 days, transit 10–15 days), and carry a 365-day mail return window. The £935.00 CG2000 price is valid to 2027-10-19, InStock NewCondition, and ships to GB, DE, FR, IT, ES, NL, BE, AT, SE, DK, FI, IE, PT, PL and CZ; the CG1000 at £685.00 and CD2000 at £935.00 follow the same shipping and return terms.

O2/Vodafone multi-floor office, hotel, warehouse, retail or farm estate, 2000m², 200 devices, calls must hold, spread beyond 4 antennas needs high output: CG2000 at £935.00, Band 20+8, ≥27dBm, 10 antennas, Yagi included, the only high-output 2000m² box that boosts O2/Vodafone calls.

O2/Vodafone single-floor commercial site, up to 1000m², 100 devices, save £250.00: CG1000 at £685.00, same bands, lower output, 4 antennas, smaller footprint.

EE-led business, 2000m², EE calls matter: CD2000 at £935.00, Band 20+3, accept O2/Vodafone data-only.

Quick verdict: pay the £250.00 for CG2000 only when the site reaches 2000m², 200 users, ≥27dBm output and 10 antennas; at the £0.00 tie, CG2000 serves O2/Vodafone calls and CD2000 serves EE calls, so match the voice band to your SIM and the output to the spread rather than chasing the biggest spec sheet.