Conclusion first. The CVGW and the CVGD both cost £259.99, both deliver 45 dB uplink and 40 dB downlink gain, both cover 100 m², both support 15 simultaneous users, both use the same neodymium magnetic roof aerial and the same 5V DC cigarette-lighter host. The only real difference is the data band. The CVGW filters Band 1 2100MHz 3G UMTS; the CVGD filters Band 3 1800MHz 4G LTE. Both keep Band 8 900MHz 2G voice. So the decision is not about specs or price — it is about where you drive.

If your working or leisure routes run through rural Britain — Cumbria, Wales, the Highlands, Devon lanes — pick the CVGW. On those roads the 2100MHz 3G layer is often the only signal that reaches you, and it holds steady at 3 to 10 Mbps. If your routes are towns, motorways and cities, pick the CVGD. There the 1800MHz 4G layer is everywhere and delivers 10 to 30 Mbps. Spend the same £259.99 on the band your geography actually uses, and you will never regret it.

Most buyer confusion in the Boost4U vehicle range starts and ends here. Two black boxes on the shelf, both priced at £259.99, both badged as dual-band, both described with the same gain and coverage numbers. A shopper who skips past the band row on the spec sheet can easily order the wrong one. Order the CVGD expecting rural 3G and you will find its Band 3 4G channel is silent on the very lanes where you need it. Order the CVGW expecting fast urban 4G and you will be capped at 3G speeds in a town where 4G was free anyway.

This guide exists to make that band choice impossible to get wrong. We strip away the shared features and focus on the six things that actually separate the CVGW from the CVGD, then give you a decision tree that sends you to the right box based on the roads you drive, not the price tag.

Before the differences, the similarities matter because they mean you are never downgrading hardware by choosing one over the other. Both units share:

• The same £259.99 GBP purchase price — there is no price penalty either way.
• The same Band 8 900MHz 2G GSM voice and SMS leg, serving EE, O2 and Vodafone.
• The same 45 dB uplink / 40 dB downlink vehicle-grade low-gain, anti-oscillation design.
• The same 100 m² cabin or small-caravan coverage area.
• The same up to 15 simultaneous users limit.
• The same neodymium magnetic-mount omnidirectional roof aerial, stable to 70 mph on steel, adhesive pad for aluminium or fibreglass.
• The same built-in indoor antenna in a cigarette-packet host, with a 5 m coax.
• The same 5V DC cigarette-lighter power, with an optional 240V AC adapter for static pitches.
• The same 5 to 10 minute drill-free install, coax through a door or window seal.
• The same UKCA, CE and Ofcom licence-exempt certification with AGC automatic gain control.

Everything about the physical kit, the install, the power and the cabin coverage is interchangeable. The split is purely in the radio spectrum each box filters.

Difference 1: The data radio band

The CVGW filters Band 1 2100MHz, a 3G UMTS channel. The CVGD filters Band 3 1800MHz, a 4G LTE channel. Both also filter Band 8 900MHz for 2G voice. That single row — Band 1 versus Band 3 — is the whole product.

Difference 2: Real-world data speed

Where a usable outside signal exists, the CVGW lifts in-car 3G HSPA+ from roughly 0.5–2 Mbps to 3–10 Mbps. The CVGD lifts in-car 4G LTE from roughly 1–5 Mbps to 10–30 Mbps. On paper the CVGD is three times faster. In a rural valley where Band 3 has no signal at all, the CVGW is the only box producing any data at all.

Difference 3: The geographic sweet spot

The CVGW is tuned to the long-reach 2100MHz 3G layer that still penetrates remote hills, moorland and forest. The CVGD is tuned to the 1800MHz 4G layer that blankets towns, suburbs and major road corridors but fades quickly once you leave the edge of a settlement.

Difference 4: Network longevity and sunset risk

UK operators are gradually switching off 3G in some areas, which is a genuine risk to weigh for the CVGW. However, on the exact rural routes where 2100MHz 3G remains the only reachable signal, operators are keeping it alive because there is no 4G alternative. The CVGD's 4G layer is the longer-lived technology, but only in places where 4G exists in the first place.

Difference 5: Which operators benefit from the data leg

Band 1 2100MHz 3G runs on all four networks including Three, which leans heavily on 2100MHz. Band 3 1800MHz 4G runs on EE, Vodafone and Three; O2's 4G in the UK primarily rides on Band 20 and Band 7. So an O2 driver gets voice from Band 8 on both boxes, but data only meaningfully on the CVGW's Band 1 3G (or a separate CVC Band 20 box), not on the CVGD's Band 3.

Difference 6: The ideal driver profile

The CVGW suits rural HGV drivers, farmers, gamekeepers, motorhomers and remote tourers whose livelihood or hobby depends on a steady link in the back of beyond. The CVGD suits urban and suburban commuters, family cars and delivery vans that spend their day around towns where 4G is dense.

The uncomfortable truth is that £259.99 spent on the wrong band is £259.99 wasted. Neither box is objectively cheaper or better-built than the other. The value is entirely a function of matching the band to the signal that exists on your regular roads. A CVGD in a Cumbrian dale returns no more data than a £0 paperweight, because there is no Band 3 signal to amplify. A CVGW on the M25 returns slower data than your phone would get bare, because the 4G is already strong and you have paid for a 3G channel you do not need.

Branch A — Rural / remote: You drive Cumbria, Northumberland, Wales, the Highlands, Devon lanes, farm tracks or moorland. Your phone regularly drops to one bar or no bars, and when data works it is often a 3G HSPA icon. → Choose the CVGW. The 2100MHz Band 1 channel is the one that actually reaches you, and the Band 8 voice leg keeps calls alive.

Branch B — Urban / suburban / motorway: You commute between towns, run the M25, M1 or M6 corridor, or deliver inside a city boundary. Your phone usually shows a 4G or LTE icon, and the complaint is weak 4G inside a metal cabin rather than no signal at all. → Choose the CVGD. The 1800MHz Band 3 channel multiplies the 4G you already have into a fast 10–30 Mbps cabin link.

Branch C — Mixed, mostly towns with the odd rural trip: Err on the CVGD. Fast 4G on the daily commute is worth more than the occasional rural 3G rescue, because on the odd rural trip your phone will at least hold basic 2G voice on Band 8 via the shared voice leg.

Branch D — Mixed, mostly rural with the odd town run: Err on the CVGW. The 3G layer keeps you connected on the roads where it matters, and in town your phone will simply use the free 4G off-air with the booster idle.

Branch E — You are an O2 customer: Lean toward the CVGW for data, because O2's 4G lives on Band 20 and Band 7, neither of which the CVGD touches. The CVGW's Band 1 3G at least gives O2 a usable data leg.

Elspeth, a Shetland-based community nurse. Elspeth drives between scattered crofting parishes on single-track roads where the nearest 4G mast is 25 miles away. Her old booster was a Band 20 4G box that stayed silent on the worst stretches. She switched to the CVGW at £259.99. On the Band 1 2100MHz channel her clinic tablet now holds a steady 4 to 6 Mbps 3G link enough for patient records and her work calls stay solid on Band 8. The CVGD, at the same price, would have given her nothing on those roads.

Marcus, a London grocery courier. Marcus loops the M25 and the North and South Circular all day. His pain is not no signal — it is the cabin dropping his 4G from 3 bars to one the moment he sits under a motorway gantry or in a delivery yard lined with tall warehouses. He chose the CVGD at £259.99. The Band 3 1800MHz 4G channel lifts his courier-app and navigation data to a consistent 15 to 25 Mbps, and dropped-batch errors vanish. The CVGW would have capped him at 3G speeds in a city where 4G was already there for free.

Same price, same hardware, opposite roads. That is the entire CVGW versus CVGD argument in two sentences.

Whichever box you choose, the Band 8 900MHz voice leg behaves the same way. It carries 2G GSM voice and SMS only, and it benefits EE, O2 and Vodafone. Three runs no 2G network in the UK, so a Three customer on either box gets no separate 2G voice fallback. The difference for Three comes on the data leg: on the CVGW, Three gets 3G data on Band 1 2100MHz, which Three relies on heavily; on the CVGD, Three gets 4G data on Band 3 1800MHz where that layer exists.

For O2 customers the split is even starker. O2's 4G in the UK is carried mainly on Band 20 800MHz and Band 7 2600MHz, neither of which either the CVGW or the CVGD touches. So an O2 driver buying the CVGD gets 2G voice on Band 8 but no boosted 4G data, because O2 simply does not use Band 3. An O2 driver buying the CVGW at least gets a Band 1 3G data leg. This is why, if you are an O2 driver undecided between the two, the CVGW is the more defensible £259.99.

There is no universally better box. There is only the box that matches the spectrum your roads actually use. Spend £259.99 on the right band and either one will pay for itself many times over in saved dropped calls and live data. Spend it on the wrong band and you have an expensive paperweight.

Shop the CVGW Mobile Booster — £259.99 Band 8 & 1 Rural 3G Car Booster