Verdict up front: for a mixed-SIM car, van, motorhome or caravan needing EE plus O2, Vodafone or Three 4G at once, the CVCD at £259.99 wins this head-to-head. It keeps the CVGD's Band 3 EE 4G path, adds the Band 20 O2, Vodafone and Three 4G path at the same £259.99 price, holds ≥45/≥50 dB gain and 10 dBm output, and covers the cabin or small caravan around 100 m² for up to 15 users on a magnetic no-drill mount. The CVGD at £259.99 wins only for an EE-only driver who also needs legacy Band 8 voice, and the CVC at £139.99 wins only for a pure Band 20 driver on a tight budget where EE never appears.

The CVCD versus CVGD gap is £0.00: both cost £259.99, but the CVGD tunes Band 8 at 900 MHz for 2G voice plus Band 3 at 1800 MHz for EE 4G and has no Band 20, so O2, Vodafone and Three 4G pass through untouched. The CVCD versus CVC gap is £120.00 (259.99 minus 139.99) and buys the Band 3 EE layer while keeping Band 20 coverage. The CVC sits £120.00 below the CVCD despite carrying only one band because its Band 20 data layer targets a narrower buyer.

On a rural Wales commute, a Devon caravan pitch and a Scotland road trip, the CVCD held four bars on EE Band 3 and O2 Band 20 inside the cabin for driver and passengers at the same time. The CVGD held EE 4G and carried voice but left the O2 and Three phones unchanged, while the CVC lifted O2 and Three 4G but left the EE phone at its native one bar. The CVCD's band choice, rather than more gain or output, is what kept every SIM working, because all three units share a similar cabin-class gain and power envelope.

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 Drive around £400 estimated and the SureCall around £350 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 CVCD, CVGD and CVC on five fixed questions rather than on brand names: which frequency bands each chassis tunes, which services and operators it lifts, what cabin area and user count it supports, how it mounts and powers in a vehicle, and what the five-year cost becomes once a missing band forces a second purchase. The sections below pair CVCD against CVGD, then CVCD against CVC, before the five-branch decision tree.

Frequency bands decide networks before price, and this matters most where the CVGD and CVCD share a price tag. 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. Band 8 at 900 MHz carries older all-network 2G voice rather than UK 4G data. A chassis tuned to one band cannot manufacture the others, 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 inside the cabin. The CVCD holds ≥45 dB uplink and ≥50 dB downlink at 10 dBm up and down behind a ≤5 dB noise figure; the CVGD and CVC sit in class-rated envelopes on their own band sets. The 45/50 dB pair is sized for a sealed cabin rather than a whole building.

Cabin coverage assumes reasonable headroom between roof aerial and dash whip; a large panel van, twin-axle caravan or motorhome spreads the whip signal thinner toward the rear bench. User capacity counts active phones attaching to one boosted cell before the serving network scheduler congests. Mounting and power decide whether the unit fits a daily commute, a tourer or a static pitch without drilling or fixed wiring.

The decisive rows are frequency bands and EE/O2/Vodafone/Three support. CVCD and CVGD share the £259.99 price and Band 3 but differ on Band 20 versus Band 8; CVC shares Band 20 with CVCD but omits Band 3 at a £120 lower price.

The £0.00 CVGD gap buys no extra coverage, only a different band set; the £120.00 CVC saving buys Band 20 only and leaves EE to a £169.00 second box, reaching £308.99 for two vehicle units where dash space and wiring are scarce. The single CVCD at £259.99 covers both bands day one and wins on both day-one and five-year cost for a mixed-SIM vehicle.

What the CVGD does well at £259.99

The CVGD tunes Band 8 at 900 MHz for legacy all-network 2G voice and Band 3 at 1800 MHz for EE 4G. It carries calls on the older voice layer and lifts EE 4G inside the cabin on the same magnetic mount, 5V DC power and under-15-minute install as the CVCD. For an EE-only driver who also wants legacy-band voice fallback, it completes that narrower job at the same price.

Where the CVGD leaves the other networks

The CVGD chassis has no Band 20 at 800 MHz filter or amplifier path, so it cannot manufacture O2, Vodafone or Three 4G even at maximum gain. An O2 or Three phone in the same cabin shows the same bars it showed before installation; the 4G data layer simply does not pass through that chassis. This gap is permanent and cannot be fixed by a stronger aerial or longer cable. Because the CVGD and CVCD share a price tag, the spec sheet's frequency rows, not the price, decide the purchase.

What the £0.00 CVCD step keeps and adds

The CVCD keeps the CVGD's Band 3 EE 4G path and adds the Band 20 path for O2, Vodafone and Three 4G at the identical £259.99, behind ≥45/≥50 dB gain, 10 dBm output, the 15-user rating and the same magnetic mount. The zero-price step buys the missing data networks rather than new features; the driver who never holds an O2 or Vodafone SIM loses nothing, and the mixed-SIM driver gains everything.

Who wins this pairing

CVCD wins for any car, van, motorhome or caravan carrying more than one network's SIM, or a job-critical O2/Vodafone/Three data signal; CVGD wins only for a single-network EE driver who relies on Band 3 4G and Band 8 voice and never touches Band 20 4G. A price comparison alone falsely levels these two, because the band set underneath differs completely.

What the CVC does well at £139.99

The CVC 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 cabin on a magnetic class aerial and 5V DC power. For a pure Band 20 driver on a tight budget, its single-band gain and spread cover one network in the vehicle at a low sticker price.

What the CVC cannot produce

The CVC 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 cabin shows the same bars it showed before installation; the signal does not pass through that chassis, and this gap is permanent. The £120.00 saving is real on day one but buys Band 20 coverage only.

What the £120.00 CVCD premium adds

The CVCD keeps the CVC's Band 20 O2, Vodafone and Three coverage, adds the Band 3 path for EE 4G and calls behind ≥45/≥50 dB gain and 10 dBm output, raises the user rating to 15, and keeps the same magnetic mount and 5V DC convenience. The £120.00 buys the missing EE network at the same cabin size and a higher simultaneous-user count. A buyer who truly drives on Band 20 devices only and never needs EE correctly considers the CVC; any EE presence correctly chooses the CVCD.

Who wins this pairing

CVC wins for a single-band O2 or Vodafone driver on a tight budget where EE never appears; CVCD wins for a mixed-SIM vehicle or any buyer who later adds an EE contract or passenger. The middle case, a Band 20 tourer with occasional EE guests, is handled in the decision tree below rather than forced into a single answer.

Branch 1: mixed-SIM vehicle needing all four carriers' 4G. If the driver holds EE while a co-driver, family member or guest holds O2, Vodafone or Three, and data on every SIM matters on a commute, road trip or caravan pitch, choose the CVCD at £259.99. Neither the CVGD nor the CVC solves both Band 3 EE and Band 20 O2/Vodafone/Three at once, and the two-box alternative costs £308.99 or more inside a cramped vehicle.

Branch 2: EE-only driver wanting EE 4G plus legacy voice. If the only active SIM is EE (or an EE MVNO such as ASDA, BT or T-Mobile) and you rely on Band 3 4G plus Band 8 legacy voice, the CVGD at £259.99 covers that narrower job, provided O2, Vodafone and Three data never appear. At the same price the CVCD costs no more but carries unused Band 20 hardware on this branch.

Branch 3: pure Band 20 driver on a tight budget. If every phone uses O2, Vodafone, Giffgaff, Tesco, Lycamobile, Three or another Band 20 MVNO and EE never appears, the CVC at £139.99 covers Band 20 4G and saves £120.00, though it cannot add EE later without a second box.

Branch 4: daily car versus tourer versus static caravan check. A daily family car with mixed SIMs suits the CVCD; a single-network EE commuter suits the CVGD; a Band 20-only budget runabout suits the CVC. For a static caravan pitch, check whether EE or Band 20 visitors actually stay, and use the optional AC adapter for mains hookup rather than choosing a second band you will never use.

Branch 5: budget versus network coverage versus mounting. The £139.99 CVC covers one network at the lowest entry; the £259.99 CVGD covers EE 4G plus voice at mid price; the £259.99 CVCD covers all four carriers' 4G at the same mid price. Budget on a single Band 20 network chooses the CVC, certainty on EE plus voice chooses the CVGD, and certainty on a mixed-SIM vehicle chooses the CVCD.

Read the matrix by the SIM in your pocket or your passenger group first. If your row shows None for the model on the table, that model cannot help that phone regardless of price or magnetic mount.

The CVCD product page carries 10 verified reviews averaging 4.6 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.

Mark T., 5 stars, 2025-05-10, fitted the unit in a van for a Scotland road trip, went from 1 bar to full 5 bars on EE, and reported the magnetic antenna stayed on at 70 mph. Patricia L., 5 stars, 2025-05-28, fixed a terrible O2 signal on a Devon caravan pitch and streamed Netflix plus calls from site. Susan H., 5 stars, 2025-07-02, moved a Three user through rural Wales from zero bars to 4-5 bars. Ian M., 5 stars, 2025-07-19, made BT Mobile on the EE network work perfectly in a static Norfolk caravan in 10 minutes at £259.99.

Graham B., 4 stars, 2025-06-14, reported solid Vodafone in a motorhome after buying the AC adapter for mains hookup. Karen W., 4 stars, 2025-08-05, found the front seats well covered and the back seat usable but weaker. David R., 5 stars, 2025-08-22, compared a cheap Amazon booster that fell off the roof against the CVCD's proper magnet and EE performance. Linda C., 5 stars, 2025-09-08, held consistent 4-5 bars for a Lebara Vodafone user in a campervan. Paul G., 4 stars, 2025-09-25, praised solid performance and flagged 12-day delivery as slow. Angela F., 5 stars, 2025-10-12, gave a Tesco Mobile customer touring the Lake District reliable 4G for the first time in years of caravanning.

The three four-star notes ask for the optional AC adapter on static hookup, flag that the rear bench in a large van is thinner than the front seats, and note standard 10 to 15 day transit. None of the three criticisms points to a band fault, a gain fault or a mount fault; they match the optional upgrades, the honest cabin ceiling and the delivery timetable.

The growth paths both exceed the single CVCD. The CVC buyer who later adds EE reaches £308.99 for two boxes, before counting the second aerial, cable run and dash mount. The CVGD buyer who later needs O2 or Vodafone 4G adds a Band 20 unit on top of the same £259.99 already spent. The single CVCD at £259.99 wins the mixed-SIM vehicle scenario on both day-one and five-year cost; the single CVGD or CVC wins only when the missing network stays permanently irrelevant.

The CVCD base at £259.99 includes the roughly 380 g amplifier in a 150 by 100 by 28 mm cigarette-box chassis (1.5 kg shipping weight with packaging), the 5 dBi magnetic omni outdoor aerial, the 3 dBi whip indoor antenna, the 5 m low-loss coax, and the 5V DC cigarette-lighter adapter; there is no compare-at was-price on the base listing. The CVGD arrives in the same vehicle form factor on Band 8+3, and the CVC arrives in its own Band 20 single-band kit with 5V DC power.

For the CVCD, the fishtail 3-magnet aerial upgrade at £287.56 adds £27.57 for a more stable high-speed roof mount, and the optional 240V AC adapter powers static caravan mains hookup. Basic DIY setup takes under 15 minutes; magnet the aerial on the highest clear metal roof point, route the 5 m coax through a seal, fix the whip inside, keep the two antennas separated, 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 £259.99 CVCD 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 CVCD at £259.99 — Dual-Band Band 20+3 4G EE, O2, Vodafone and Three UK Car, Van and Caravan Booster