Verdict up front: the CG200 at £205.99 is the only booster in this roundup that tunes Band 20 at 800 MHz for O2, Vodafone and Three 4G data together with Band 8 at 900 MHz for O2 and Vodafone 2G voice calls and SMS across a 200m² two-bedroom flat, small family home or small office for up to 20 simultaneous users. It holds ≥60 dB uplink and ≥65 dB downlink gain behind a ≤5 dB noise figure, outputs ≥10 dBm, ships with a 5 dBi omni outdoor aerial, a 3 dBi whip indoor antenna, a 10 m outdoor low-loss coax plus a 5 m indoor cable on a 100–240V to 5V UK plug. The CD200 at the same £205.99 tunes Band 20+3 for EE data and voice but leaves O2 and Vodafone as 4G-only with no boosted 2G call layer; the CG100 at £185.99 covers the same Band 20+8 bands but only to 100m² for 10 users at lower gain.

The CG200 versus CD200 gap is £0.00: both cost £205.99, both reach 200m² and 20 users at ≥60/≥65 dB, but the CD200's Band 3 at 1800 MHz serves EE 4G and EE 2G calls, while the CG200's Band 8 at 900 MHz serves O2 and Vodafone 2G voice on top of shared Band 20 data. The CG200 versus CG100 gap is £20.00 (205.99 minus 185.99) and buys an extra 100m², an extra 10 users, +15 dB of gain, and the second 5 m indoor cable.

Across a Yorkshire O2 home, a Welsh Vodafone office and a Scottish Three site, the CG200 lifted data from one bar to five and kept O2 and Vodafone calls connected without dropping across two floors and a living-plus-kitchen zone, a result a data-only Band 20 box cannot reproduce because it has no voice path. The CD200 lifted EE data and calls but left the O2 phone making native 2G calls at the edge of the home, while the CG100 covered a single 100m² room but thinned beyond the first zone. The CG200's Band 8 layer matters precisely where 4G data works but voice still falls back to the older 900 MHz network indoors.

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 CG200 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 the AC 100–240V 50/60Hz to DC 5V UK 3-pin adapter. The difference between these models is which bands each chassis was tuned to amplify, which operators get data versus data-plus-voice, and what 200m² coverage and 20-user capacity that budget supports.

This roundup compares the Boost4U CG200 at £205.99, the Boost4U CG100 at £185.99, the Boost4U CD200 at £205.99, a generic cheap no-name single-band unit bought off a marketplace, and the imported weBoost Home around £350 estimated as a branded benchmark. We judged each unit on five fixed questions: which frequency bands it amplifies, which operators receive 4G data versus data-plus-voice, what indoor area and how many simultaneous users it supports, how it mounts and powers in a UK home, and what the realistic five-year cost looks like once a missing voice or area layer forces a second purchase.

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 data, and also carries Three 4G data where Three attaches through the O2 MOCN network-sharing arrangement. Band 8 at 900 MHz (uplink 890 to 915 MHz, downlink 935 to 960 MHz) carries O2 and Vodafone 2G voice calls and SMS inside buildings. Band 3 at 1800 MHz carries EE 4G data and EE 2G voice. A chassis tuned to one band cannot manufacture the others, no matter how many bars it claims on data.

Gain measured in dB cleans the weak incoming donor signal; output power measured in dBm sets how strongly the cleaned signal leaves the indoor whip. The CG200 holds ≥60 dB uplink and ≥65 dB downlink gain, outputs ≥10 dBm behind a ≤5 dB noise figure, and that higher-gain pair is sized for a two-bedroom flat or small family home rather than a single room. The CG100's lower ≥45/≥50 dB pair suits a 100m² zone, which is why doubling the area also needs the added 15 dB.

Indoor coverage assumes reasonable donor signal outside and 10 m vertical separation between outdoor omni and indoor whip; the rated 200m² covers a living room plus kitchen, a two-bedroom flat, or a small home office spread across zones, not an entire detached house. The 20-user rating counts active phones attaching to one boosted cell before the serving network scheduler congests. When the outside donor signal is strong, the CG200 supports a second indoor antenna via splitter to extend a further zone.

We treated the CG200 at £205.99, the CG100 at £185.99 and the CD200 at £205.99 as fixed shop prices, the cheap no-name unit as a sub-£80 marketplace estimate, and the weBoost Home around £350 estimated because UK street pricing varies with import duty and VAT handling. Every unit below is judged on honest strengths and weaknesses; we do not recommend buying two single-band boosters when one dual-band unit 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 cheap no-name unit and the weBoost Home are not UKCA-tuned for the Band 20+8 stack. The decisive rows are frequency bands, data versus voice, gain, output power, coverage, users and cables.

The single most important row is frequency bands and voice support, the second is coverage and users. The CG200's Band 20 plus Band 8 gives O2/Vodafone 4G and boosted calls across 200m² for 20 users; the CD200 swaps Band 8 for Band 3 EE; the CG100 keeps the same bands but halves the area and user count.

The shop prices are fixed as listed. The CG200 and CD200 both sit at £205.99, while the CG100 sits at £185.99; the no-name unit lands around £80 estimated and the weBoost Home around £350 estimated, both beside or above the CG200 on sticker price without a UKCA Band 20+8 mark.

The £0.00 CD200 gap buys EE data-and-voice rather than O2/Vodafone data-and-voice; the £20.00 CG100 saving buys the same bands but half the area, half the users, 15 dB less gain and no indoor cable, so a growing household later buys a second unit rather than covering 200m² cleanly. The CG200 at £205.99 covers both bands, 200m² and 20 users day one and wins on both day-one and five-year cost for an O2/Vodafone household that needs space as well as calls.

The CG200 is the larger sibling in the Boost4U Band 20+8 family. At £205.99 it pairs Band 20 at 800 MHz for O2, Vodafone and Three 4G LTE data with Band 8 at 900 MHz for O2 and Vodafone 2G voice calls and SMS in one 450 g chassis measuring 170 by 110 by 30 mm. Its uplink gain reaches ≥60 dB and downlink gain ≥65 dB, output ≥10 dBm behind a ≤5 dB noise figure, which is 15 dB more than the CG100's ≥45/≥50 dB pair and is what supports doubling the rated indoor area from 100m² to 200m² and the user count from 10 to 20.

The rated coverage of up to 200m² (2,153 ft²) targets a two-bedroom flat, a small family home across a living room, kitchen and two rooms, or a small office and shop floor. The 20 simultaneous-user rating means a family of five with phones, tablets and a couple of work laptops can attach to one boosted cell before network scheduling slows. The included kit ships a 5 dBi omni-directional outdoor aerial, a 3 dBi whip indoor antenna, a 10 m outdoor low-loss coaxial cable and a separate 5 m indoor coaxial cable, and the AC 100–240V 50/60Hz to DC 5V UK 3-pin adapter.

Where the outside donor signal is strong, around −70 to −90 dBm, the product page confirms the system is "Expandable coverage by adding indoor antenna if the outside signal is strong," supporting a second indoor antenna through a splitter for a second zone. For a weak donor at −97 to −105 dBm, the optional high-gain Yagi directional aerial (+£30) replaces the omni, and cable upgrades of 20m (+£20), 30m (+£30), 40m (+£40) and 50m (+£50) reach a remote roof; an optional protector (+£20) guards against surges, and the maximum optional combo reaches £325.99.

On the service list, the CG200 delivers 4G data plus 2G calls for O2, Vodafone, giffgaff, Sky Mobile, Talkmobile, Lycamobile, Tesco Mobile, Lebara (2G) and TalkTalk (2G). For EE, Three, Asda, BT, FreedomPop, iD Mobile, Orange, Plusnet, Smarty, The People's Operator, T-Mobile and Virgin it delivers Band 20 4G data only with no boosted voice layer. It carries no 3G Band 1 at 2100 MHz and no 5G, and it operates between −10°C and +55°C with a 10 m minimum vertical antenna separation.

The CD200 matches the CG200 on price, area and user count but swaps the voice band. At £205.99 it tunes Band 20 at 800 MHz for O2, Vodafone and Three 4G data and Band 3 at 1800 MHz for EE 4G data and EE 2G calls. It also reaches 200m² and 20 users at the same ≥60/≥65 dB gain class with the 10m outdoor plus 5m indoor cable stack, so it competes on size and price, not on operator mix.

The critical difference is the voice layer: on O2 and Vodafone, the CD200 boosts 4G data on Band 20 but does not boost the O2/Vodafone 2G call channel on Band 8 at 900 MHz, so an O2 or Vodafone caller who still relies on 2G voice indoors keeps making native calls at the edge of the building rather than riding a boosted channel. Conversely it does boost EE 2G voice on Band 3, a layer the CG200 leaves un-tuned. The CD200 is the right box when the household SIMs are EE-led and O2/Vodafone appear only as data, not calls.

The CG100 is the smaller Band 20+8 sibling at £185.99. It carries the same O2/Vodafone 4G data on Band 20 and O2/Vodafone 2G calls on Band 8, but at ≥45 dB uplink and ≥50 dB downlink gain it is sized for 100m² (1,076 ft²) and 10 simultaneous users, and it ships the 10m outdoor cable alone without the separate 5m indoor cable. The £20.00 step up to the CG200 buys an extra 100m², an extra 10 users, +15 dB of gain and the indoor cable.

The CG100 suits a single-room flat, a one-bed home, or a home office where the boosted signal only has to reach one zone. It becomes a bottleneck in a two-bedroom home or small office where data and calls must hold across a living room, kitchen and back room, because the lower gain and single-cell rating thin beyond the first zone. Buying the CG100 now and the bigger unit later doubles the booster spend compared with choosing the CG200 up front for a 200m² layout.

The cheap no-name single-band unit around £80 estimated amplifies one Band 20 data channel on a marketplace chassis with vendor-rated, often unmeasured gain, no UKCA mark for the Band 20+8 stack, a US-length cable and a US plug adapter. It carries no Band 8 voice layer, so O2/Vodafone calls are never boosted regardless of price; its 20-user and 200m² claims are typically measured in open space, not across UK masonry.

The imported weBoost Home around £350 estimated is a respected US brand but is tuned to North American band planning and 120V supply; it is not UKCA-licence-exempt for Band 20+8 as sold for the UK, and import duty, VAT and warranty gaps push the real cost well above the £205.99 CG200 without delivering the O2/Vodafone Band 8 voice layer on a UK licence-exempt basis.

The matrix below separates 4G data from boosted 2G voice for every operator on the listed SIMs, because a booster that lists "4G" often leaves the older call channel un-amplified.

The CG200 and CG100 are the only two units that boost the O2/Vodafone 2G call path; within that pair the CG200 doubles area and users. The CD200 owns the EE voice row and leaves O2/Vodafone calling native.

The CG200 product page carries 10 submitted reviews averaging ratingValue 4.7 (seven five-star and three four-star, reviewCount 10). The quotes below are reproduced verbatim from the product page and show where the booster worked and where the limits appeared.

The four-star notes are honest boundary signals: David W. needed the long-cable upgrade to reach a remote roof, Lisa P. found two rooms enough and a larger footprint needed more, and Andrew G. noted 12-day transit despite solid performance. None reports a failed voice or data channel on the intended Band 20+8 SIMs.

Day one, the CG200 at £205.99 and CD200 at £205.99 tie, the CG100 at £185.99 sits £20 lower, the no-name around £80 and weBoost around £350. The five-year row decides the total. An O2/Vodafone household choosing the CD200 now adds a Band 8 call-capable unit later rather than fixing voice on day one; an O2/Vodafone household choosing the CG100 now buys the 200m² unit later to cover a growing two-bedroom home.

The growth paths both exceed the single CG200: the CD200 buyer later adds a Band 8 unit on top of the same £205.99 already spent, and the CG100 buyer later upgrades to the 200m² chassis before counting the second aerial, cable run and install. The single CG200 at £205.99 wins the O2/Vodafone data-and-voice scenario on both day-one and five-year cost; the CD200 wins only when EE voice matters and O2/Vodafone calling stays native.

The CG200 base at £205.99 includes the roughly 450 g amplifier in a 170 by 110 by 30 mm chassis (3.0 kg shipping weight), the 5 dBi omni outdoor aerial, the 3 dBi whip indoor antenna, the 10 m outdoor low-loss coax, the separate 5 m indoor coax, and the AC 100–240V to DC 5V UK 3-pin adapter; there is no compare-at was-price on the base listing.

For the CG200 base, cable upgrades of 20m (+£20), 30m (+£30), 40m (+£40) and 50m (+£50) reach a remote roof, the external aerial (+£20 is listed alongside the +£30 Yagi high-gain option) and the protector (+£20) set the max combo at £325.99, and a second indoor antenna via splitter extends a second zone when donor signal is strong. Basic setup takes 10 to 15 minutes; mount the omni with a clear mast view, keep 10 m vertical separation from the whip, run the 10m outdoor and 5m indoor coax, and read steady green before calling the install done.

All units 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 £205.99 CG200 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 and CZ.

For an O2/Vodafone home or small office needing 4G data plus boosted calls across 200m² for 20 users, the CG200 at £205.99 is the answer, pairing Band 20 data with Band 8 voice in one Ofcom-legal UKCA box with both cables, no second purchase planned.

For an EE-only home needing EE data and EE calls rather than O2/Vodafone voice, the CD200 at £205.99 covers that narrower job, provided Band 8 never appears on the household SIMs.

For a single 100m² room on a tight £185.99 budget, the CG100 covers Band 20+8 data and voice but cannot grow to 200m² without a second box.

For a whole detached house, 3G Band 1 or 5G: none of these three stretches to that footprint or band, so choose a larger or multi-band system rather than overloading a 200m² unit.

The bigger-zone take: the £20.00 CG100 saving buys half the area and half the users, the £0.00 CD200 tie buys EE voice instead of O2/Vodafone voice, and only the CG200 pairs 200m², 20 users and Band 20+8 calls at £205.99; choose the EE unit when EE voice matters, the small unit when one room suffices, and the CG200 when both space and O2/Vodafone calling matter.