The CVW boosts Band 1 (2100 MHz) 3G UMTS only — both 3G voice calls and 3G / 3.5G HSDPA mobile data. It does NOT boost 4G LTE and it does NOT boost 5G NR. This is deliberate: in many rural parts of the UK, Band 1 3G is still the only reliable service reaching remote roads and caravan parks. If your area already has strong 4G and you want faster mobile data, the CVC (Band 20 800 MHz O2 / Vodafone 4G) is the right product instead.

Yes. The CVW is the only Boost4U vehicle booster that strengthens Band 1 3G across all four UK networks. It boosts the physical radio signal, not a specific SIM — so if your phone is on EE, your partner's on O2, and your children's on Three, every handset inside the cabin gets a cleaner 3G signal simultaneously. Every MVNO riding on the four networks also works (giffgaff, Tesco Mobile, Sky Mobile, SMARTY, iD Mobile, Lebara, Lycamobile, Plusnet, BT, Asda, Talkmobile, TalkTalk, Freedom Pop, Virgin etc.).

You need at least 1–2 bars of outdoor Band 1 (2100 MHz) 3G at the point where the magnetic roof aerial sits. The CVW amplifies that weak donor signal up to 45 dB uplink / 40 dB downlink to a full-strength signal inside the cabin. If your phone shows zero bars and runs emergency-only outside, no Ofcom-legal booster in this price range can create signal from nothing. We recommend checking Band 1 signal in your phone's field-test mode at the roof position before buying.

The CVW is rated for up to 10 simultaneous users / devices. That is plenty for a family car (four phones + a tablet + a sat-nav), a crew-cab truck (driver + co-driver + a route planner), or a small commercial fleet van running a handful of handsets. It is not a router — each device still uses its own SIM and its own data plan — but every device in the boosted cabin area benefits from the cleaner 3G signal at the same time.

UK Ofcom rules cap vehicle-mounted boosters at lower gain to protect the mobile network — a moving vehicle close to masts can cause interference if gain is too high. The CVW's 45±2 dB uplink / 40±2 dB downlink is the legal, vehicle-grade sweet spot: strong enough to turn 1–2 bars of rural 3G into a stable full-bar call and HSDPA data stream, but low enough that AGC can throttle it automatically as you approach a mast. Do not expect fixed-home-covering reach — it is tuned for a cabin, not a house.

The CVW's outdoor aerial uses three magnets for a firmer hold than a single-magnet aerial, and the fishtail shape is aerodynamically shaped to reduce wind lift at speed. Press it down firmly onto a clean steel roof dead-centre before setting off. Two caveats: it will not magnetically grip aluminium, carbon-fibre or fibreglass / GRP motorhome roofs (use the adhesive pad or screw bracket), and on very high-speed runs we recommend checking it at each fuel stop.

Yes. The CVW is a 5V DC unit, so you can power it from a 220V AC mains adapter (ordered separately) plugged into the caravan hook-up, or even from a USB power bank at a remote off-grid pitch. The booster itself is identical whether powered by the car cigarette-lighter, the mains adapter or a power bank. The box ships with the 5V DC car adapter; the 220VAC adapter is an optional extra.

It depends on whether Band 1 3G is still switched on in your area. EE, O2, Vodafone and Three have been phasing out 3G in parts of the UK. If your phone can still latch onto Band 1 3G outdoors (check field mode), the CVW will improve it. If your local mast has already retired 3G and your phone only ever shows 4G or 5G, the CVW cannot help — you need a 4G booster (the CVC for O2 / Vodafone Band 20) instead. When in doubt, check your phone's network selector before ordering.

Yes. The CVW is Ofcom licence-exempt, UKCA and CE certified, and complies with UK mobile signal booster regulations. As long as you use it as supplied — 45 dB uplink / 40 dB downlink gain, 10 dBm output, Band 1 only — on a vehicle or caravan, you do not need to notify Ofcom or pay for a licence. Do not modify the unit, swap the antenna, or fit a higher-gain external aerial; that would void the compliance and the warranty.

No — the CVW is a cellular signal booster, not a Wi-Fi router. It makes your phone's own 3G connection stronger inside the cabin. If you want a motorhome Wi-Fi network, put your phone (or a separate 3G / 4G dongle) into Wi-Fi hotspot mode inside the boosted signal; the CVW will then improve the cellular connection feeding that hotspot. It does not create or rebroadcast Wi-Fi itself, and it has no built-in hotspot function.