Answer up front: if your household or small office mixes EE, O2, Vodafone and Three SIMs and needs 4G data plus a universal call fallback rather than betting on one legacy 2G band, the CW100 at £185.99 is the pick; it pairs Band 20 at 800 MHz data with Band 1 at 2100 MHz 3G UMTS for data, voice and SMS across all four networks, cleans at ≥45 dB uplink and ≥50 dB downlink, outputs ≥10 dBm behind a ≤5 dB noise figure, and covers a 100m² (1,076 ft²) space for up to 10 users with the 5 dBi omni, 3 dBi whip and 10m coax. If your SIMs are O2/Vodafone-led and you rely on legacy 2G calling, the CG100 at £185.99 tunes Band 8 for those calls; if your SIMs are EE-led and you rely on EE 2G calling, the CD100 at £185.99 tunes Band 3. All three cost the same and share the same area, users, gain, output and kit.

The £0.00 CW100-versus-CG100 and CW100-versus-CD100 gaps buy different fallback bands rather than more machine: same £185.99, same 100m², same 10 users, same ≥45/≥50 dB gain, same ≥10 dBm output, same 10m cable, same omni and whip. The CW100's Band 1 at 2100 MHz serves a 3G fallback on EE, O2, Vodafone and Three; the CG100's Band 8 at 900 MHz serves only O2/Vodafone 2G; the CD100's Band 3 at 1800 MHz serves only EE 2G. No single chassis covers a universal 3G fallback AND a legacy 2G band at once, because Band 1, Band 8 and Band 3 are separate channels this family does not combine.

This page compares the three £185.99 Boost4U chassis side by side rather than in a roundup: the CW100, the CG100 and the CD100. It separates the data layer on Band 20 (shared by all three) from the fallback layer (Band 1 3G on the CW100, Band 8 O2/Vodafone 2G on the CG100, Band 3 EE 2G on the CD100), sizes the identical cabin, user, gain and output spec, and gives a five-branch decision tree so the choice follows which SIMs you hold, whether VoLTE covers your calls, and whether universal fallback or one operator's legacy band matters.

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 5G; the CW100 is the only one that carries 3G Band 1, while CG100 and CD100 carry a legacy 2G band instead. All run from the AC 100–240V to DC 5V UK Type plug. The rest of this page numbers every band and £0.00 gap 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 EE, O2, Vodafone and Three 4G data, so data capability is not the deciding factor; the deciding factor is which fallback layer the chassis amplifies. Second, the CW100 adds Band 1 at 2100 MHz (uplink 1930–1990 MHz, downlink 2110–2180 MHz) for 3G UMTS data, voice and SMS on every network; the CG100 instead tunes Band 8 at 900 MHz for O2/Vodafone 2G; the CD100 tunes Band 3 at 1800 MHz for EE 2G. Third, between all three the area, users, gain, output and kit match, so the choice is purely "which call path does my SIM need?"

Because the price, 100m² space, 10-user cap, ≥45/≥50 dB gain and ≥10 dBm output are identical, this comparison never turns on power or size; it turns on band plan and operator. A household that only ever holds one network's SIMs can use the narrow legacy-voice unit; a mixed-network home or a small office with EE, O2, Vodafone and Three devices needs the universal Band 1 3G fallback.

Coverage figures assume reasonable donor signal outside and sensible antenna separation; the rated 100m² covers a single room, studio flat, small apartment, home office or shop. On a strong −70 to −90 dBm donor each chassis can add up to 2 indoor antennas via a 2-way splitter and extra cable; a weak −97 to −105 dBm donor uses the optional Yagi aimed at the nearest mast. The tables below compare specs, the £0.00 tie and day-one versus five-year cost before the decision tree.

Read the fallback rows before the price rows: the CW100 keeps Band 1 3G for all four networks, the CG100 keeps Band 8 for O2/Vodafone 2G, the CD100 keeps Band 3 for EE 2G, and all three share Band 20 4G data; then read coverage, users, gain and output, which match exactly.

Because price, area, users, gain and output are identical, no gap buys more power or more space; every £0.00 difference buys a different fallback band, and none of the three raises Band 20 data speed, which still comes from the serving mast.

The CW100 and CG100 are a £0.00 tie on upfront price, coverage (100m²), users (10), gain (≥45/≥50 dB), output (≥10 dBm), kit and cable; even the omni, whip and UK plug match. The whole difference is the fallback band the chassis amplifies, because both share Band 20 for EE, O2, Vodafone and Three 4G data.

CW100 Band 1: universal 3G for all four networks

The CW100 tunes Band 1 at 2100 MHz (uplink 1930–1990 MHz, downlink 2110–2180 MHz). On EE, O2, Vodafone and Three this provides a 3G UMTS data, voice and SMS fallback where 4G alone weakens, including MVNOs riding those networks. It does not tune Band 8 O2/Vodafone 2G; a legacy 2G-only O2/Vodafone handset that cannot fall to 3G relies on VoLTE or its native network rather than a boosted 2G channel.

CG100 Band 8: O2/Vodafone 2G only

The CG100 tunes Band 8 at 900 MHz instead, which carries O2 and Vodafone 2G voice calls and SMS, and 900 MHz reaches deeper through masonry than higher bands. On EE and Three it provides Band 20 data only with no boosted call fallback; it never tunes Band 1 3G. The CG100 is the right box when the household SIMs are O2/Vodafone-led and legacy 2G calling matters to those two networks only.

The £0.00 tie decides by call path, not by spec

Because price, coverage, users, gain, output and kit are identical, the CW100-versus-CG100 choice is a pure fallback question: mixed-network home needing universal 3G = CW100; O2/Vodafone-only household needing legacy 2G = CG100; mixed where both 3G fallback and O2/Vodafone 2G matter = no single chassis solves both, and a band-specific second unit is required rather than forcing one box.

The CW100 and CD100 also tie on price, 100m², 10 users, gain, output and kit, differing only in the fallback band. The CD100 tunes Band 3 at 1800 MHz for EE 4G and EE 2G voice, while the CW100 tunes Band 1 for all-network 3G.

CD100 Band 3: EE data and 2G calls

An EE-led household gets boosted EE 2G calls that the CW100 cannot provide; in return, O2, Vodafone and Three SIMs receive Band 20 data only, with the call channel left native rather than boosted, and there is no Band 1 3G fallback. The CD100 cannot add Band 1 later, and the CW100 cannot add Band 3 later; these are fixed fallback layers, not switchable modules.

CW100 Band 1: broad but not legacy-2G

The CW100's Band 1 keeps a 3G fallback on every direct network, which suits a mixed household, a small office with several operators, and a rural cottage where the serving mast changes by SIM; it does not reproduce a dedicated EE 2G channel. Match the fallback band to how your handsets actually complete calls today.

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

Branch 1 — Does the home or office hold more than one direct network (EE plus O2/Vodafone, or Three) and need a call fallback that works on whichever SIM is weak?

Yes: the universal Band 1 3G layer matters, so stay inside the CW100 path. Move to Branch 2 for handset type; do not pick the CG100 or CD100, which cover only one legacy 2G band.

Branch 2 — Do your handsets rely on legacy 2G rather than 3G or VoLTE, and are all SIMs O2/Vodafone?

Yes: CG100 at £185.99, Band 20+8, O2/Vodafone 2G calls, accept EE/Three data-only. No (modern phones on VoLTE/3G, mixed networks, or a rural cottage where mast strength swings): CW100 at £185.99, Band 20+1, 3G all-networks, 100m², 10 users.

Branch 3 — Are all SIMs EE-led and does EE legacy 2G voice drop indoors while O2/Vodafone appear only as data?

Yes: CD100 at £185.99, Band 20+3, EE data and 2G calls across 100m² for 10 users. Do not reach for the CW100 because it never boosts EE Band 3 2G.

Branch 4 — Do you need both a universal Band 1 3G fallback AND a legacy 2G band (O2/Vodafone Band 8 or EE Band 3) in one home?

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

Branch 5 — Do you need 5G, a multi-floor whole house beyond 100m², or more than 10 simultaneous users?

Yes: a £185.99 single-band-fallback room unit is undersized or band-wrong; choose a larger multi-antenna or 5G-capable system. No and the space fits 100m²: return to Branch 1, 2 or 3 and order the matched unit.

Day one, all three tie at £185.99. The five-year total separates them when a second purchase appears.

The CG100 buyer who later needs EE/Three fallback pays a Band 1 unit on top of the 185.99 already spent; the CD100 buyer who later needs O2/Vodafone fallback does the same. Only the correctly matched single CW100, CG100 or CD100 closes the job day one at £185.99. Because all three cost the same, the risk is buying the wrong band rather than overspending, and a second-box correction doubles the outlay.

The CW100 box at £185.99 (compare-at £230.99) holds the booster, the 5 dBi omni outdoor aerial, the 3 dBi whip indoor antenna, the UK power adapter and the 10m outdoor low-loss coax; paid variants are the high-gain Yagi, 20/30/40/50m cable and 18KA protector, max combo £305.99. On a strong −70 to −90 dBm donor, a 2-way splitter and extra coax feed up to 2 indoor antennas; a weak −97 to −105 dBm donor uses the optional Yagi aimed at the nearest mast. The CG100 and CD100 boxes carry the same cable stack, omni and whip for their respective fallback bands.

Basic setup takes 10 to 15 minutes without tools: mount the omni with a clear mast view, keep the whip a sensible distance inside, run the 10m coax, power from the UK plug, and read steady green before testing. The expansion 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 £185.99 CW100 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 CG100 and CD100 at £185.99 follow the same shipping and return terms.

Mixed-network home or small office, modern phones on VoLTE/3G, universal fallback across EE/O2/Vodafone/Three, 100m², 10 users: CW100 at £185.99, Band 20+1, the only chassis that keeps Band 1 3G on every network.

O2/Vodafone-only household on legacy 2G: CG100 at £185.99, Band 20+8, accept EE/Three data-only.

EE-only household on legacy 2G: CD100 at £185.99, Band 20+3, accept O2/Vodafone data-only.

Quick verdict: at the £0.00 three-way tie, CW100 serves universal Band 1 3G, CG100 serves O2/Vodafone Band 8 2G, CD100 serves EE Band 3 2G, so match the fallback band to how your handsets actually call rather than chasing the biggest spec sheet; all three deliver identical Band 20 data, and only the band choice separates them.