4G LTE & Calls - Car Vehicle Caravan (EE/ASDA/BT) Mobile Signal Booster
✓ Compatible with multiple users and devices
✓ Complete kit: all parts included
✓ Simpler Install and Maintenance
Improve signal strength for mobile networks such as EE, BT, and Asda in the UK using a dual-band booster tailor-made to enhance signals within vehicles. This will enable seamless VoLTE calls through an external antenna.
4G LTE Car Mobile Signal Booster UK — Boost4U CVCD (Car / Vehicle / Caravan)
The Boost4U CVCD is a plug-and-play 4G LTE (Dual Band 20 & 3 / 800 & 1800 MHz) mobile signal booster designed for cars, vans, motorhomes and static caravans, lifting in-vehicle signal from 0–1 bars to a full 5 bars, working with every major UK network including EE, O2, Vodafone, Three and all MVNOs, priced at £259.99 with free UK shipping and a 365-day money-back guarantee.
Engineered for the UK's roads and rural campsites, the CVCD amplifies the Dual Band 20 & 3 900/1800 MHz 4G LTE frequency used by all four major UK networks (and their MVNOs: BT, ASDA, Virgin, Orange, T-Mobile, Plusnet, TPO). The complete vehicle kit includes the booster unit, a magnetic-mount outdoor antenna, an indoor antenna, 5V DC car power adapter, cable and mounting hardware — no engineer required, installs in under 15 minutes.
Enhanced Signal Strength
Experience superior 4G LTE and call quality with our mobile signal booster. Designed for vehicles, it amplifies weak signals, ensuring you stay connected even in remote areas. Say goodbye to dropped calls and hello to crystal-clear conversations.
Universal Compatibility
Our booster is compatible with major UK networks including EE, ASDA, and BT. This means no matter your provider, you can enjoy improved signal strength and reliability, making it the perfect solution for multi-network households.
Easy Installation
Forget complicated setups! Our mobile signal booster comes with a complete kit and straightforward instructions, allowing you to install it quickly and effortlessly. Get back on the road with enhanced connectivity in no time.
Compact and Portable Design
With a sleek, compact design, our booster is easy to carry and fits seamlessly into any vehicle. Its small size does not compromise performance, making it an essential travel companion for anyone needing reliable mobile service.
Supports Multiple Users
Our mobile signal booster can support up to 15 simultaneous users, making it ideal for families or groups traveling together. Everyone can enjoy faster data speeds and clearer calls without any interruptions.
Environmentally Friendly
Designed with low radiation emissions, our booster not only enhances your signal but also reduces the radiation exposure from your mobile device. Stay connected while prioritizing your health and the environment.
3 Steps to Full Bars
1. Place the Outdoor Antenna
Mount the antenna where you get the best signal.
2. Connect the Booster Inside
Plug in the booster and connect to the antenna.
3. Enjoy Full Bars Everywhere
Clear calls, fast data, and no more dead zones.
4G LTE Mobile Signal Booster UK Mobile Networks EE BT Asda Vehicle Signal Improvement Dual Band Booster VoLTE Calls External Aerial
It boost All 4G/LTE and Calls signal on 800MHz, 1800MHz frequency, the frequencies used in UK and Europe used by mobile networks to deliver their mobile services: 4G and 2G (also known as GSM). It can boost UK and Europe all network operators for improving 4G/LTE signal. If your phones support 4G Calling (also called Voice over LTE or VoLTE) and your area 4G Calling is available, with the booster you can make clearer voice calls using 4G network. It also can boost UK all networks on EE, BT, Asda, Virgin, The People's Operator, Orange, T-Mobile for improving Calls & Texts signal.
The system is designed for universal 4G coverage. Unlike other kits this device will boost ALL mobile providers' 4G LTE, the solution will provide coverage on on both 800MHz, 1800MHz frequency simultaneously. It's Dual Band booster and is an ESSENTIAL if many people in the same household are on different mobile phone networks!
Eliminates Dropped Calls
Clear Voice
No Miss Important Calls
Reliable 4G/LTE Data
Send/Receive SMS
SMS Text Messages Quickly
Faster Uploads & Downloads
Signal Wider Coverage
Vehicle Signal Improved
Upgrade External Aerial
External fishtail aerial connects via 3 meter coax lead to the signal booster unit which is located inside the car. The aerial with Three magnets, its more stable.
Features
1. Convenient--- small beautiful appearance (cigarette box size), easy to carry, suitable for a variety of small space signal coverage.
2. Easy to use--- needs no complicated installation.
3. Open--- according to the external signal strength, automatic gain control ensure the signal.
4. Flexible---- can choose different power adapters, such as 220VAC adapter, mobile power, vehicle power adapter etc.
5. Low radiation--- a good signal coverage can reduce the radiation intensity of the mobile phone itself, effectively reduce the mobile phone radiation may harm the human body.
6. Environmental protection--- when you do not need to use the telephone or the Internet, can be removed at any time or unplug the power, elimination of radiation.
Specification
| Application & Bands | [Car, Vehicle 4G/LTE & Voice Calls] (Band 20, 3) |
| Country | United Kingdom |
| Boost All On | EE (2G & 4G) O2 (4G) Vodafone (4G) Three (4G) Asda (2G & 4G) BT (2G & 4G) Freedom Pop (4G) Giffgaff (4G) iD Mobile (4G) Lycamobile (4G) Orange (2G & 4G) Plusnet Mobile (4G) Sky Mobile (4G) Smarty Mobile (4G) Tesco (4G) The People's Operator (2G & 4G) T-Mobile (2G & 4G) Virgin (2G & 4G) |
| Users Supporting | 15 Simultaneously |
| Band | Dual Band 20 & 3 |
| Frequency | 800MHz & 1800MHz |
| Gain(dB) | Uplink Gp≥45; Downlink Gp≥50 |
| Up-link | 832~862 MHz; 1710~1785 MHz |
| Down-link | 791~821 MHz; 1805~1880 MHz |
| Export Power(Po) | Uplink 10; Downlink 10 |
| Power Adapter | 5V DC |
| What’s Included | 1 x Car Signal Booster/Amplifier 1 x External Aerial 1 x 5V DC Car Power Adapter |
How It Works
1
The powerful antenna reaches out to access a voice and 3G, 4G, and LTE data signal, and delivers it to the booster
2
The booster receives the signal, amplifies it, and serves as a relay between your phone and the nearest cell tower.
3
Your devices get increased cell reception, and calls and data are fed through the booster back to the network.
- Outside Antenna: Pulls in tower Signal.
- Signal Booster: Amplifies the Signal.
- Inside Antenna: Re-broadcasts Signal.
- Mobile Phone: Gets Boosted Signal.
Installation
- Mount external aerial on top back.
- Install the booster and interior antenna.
- External aerial connect to "BS" on the booster, and interior antenna connect to "MS".
IMPORTANT NOTE:
DO NOT POWER ON THE DEVICE UNTIL YOU HAVE COMPLETED THIS SETUP.
Read more about User Manual Documentation.
Application Scenarios
Specifications
| Parameter | Value |
|---|---|
| Model | CVCD / MBCVCDgb |
| Product Type | 4G LTE Vehicle / Caravan Mobile Signal Booster |
| Frequency Band | Dual Band 20 & 3 — 800 & 1800 MHz (FDD GSM/4G) |
| Uplink Frequency | 832 – 862 MHz (Band 20); 1710 – 1785 MHz (Band 3) |
| Downlink Frequency | 791 – 821 MHz (Band 20); 1805 – 1880 MHz (Band 3) |
| Max Gain | 45 dB uplink / 50 dB downlink |
| Output Power | 10 dBm uplink / 10 dBm downlink |
| Coverage | Up to 100 m² (vehicle cabin / small caravan interior) |
| Supported Networks (UK) | EE, Vodafone, BT Mobile, ASDA Mobile, Virgin, Orange, T-Mobile, Plusnet, TPO |
| Supported Services | 4G LTE data, VoLTE calls, SMS |
| Simultaneous Users | 15 Simultaneously |
| Power Supply | 5V DC DC cigarette-lighter adapter (included); also works with 240 V AC via optional adapter |
| Dimensions (Booster Unit) | 150 × 100 × 28 mm |
| Weight | Approx. 380 g (booster only) |
| Installation | Plug-and-play; magnetic antenna mounts on roof in seconds |
| Cable Included | 5 m low-loss coaxial cable |
| Outdoor Antenna | Magnetic-mount omni-directional, 5 dBi |
| Indoor Antenna | Whip antenna, 3 dBi |
| Noise Figure | ≤ 5 dB |
| Operating Temperature | -10 °C to +55 °C |
| Certification | UKCA / CE / RoHS; Ofcom licence-exempt |
| Warranty | Lifetime technical support; 365-day money-back guarantee |
What Is in the Box
| Item | Quantity |
|---|---|
| 4G LTE Booster Unit (CVCD) | 1 |
| Magnetic-Mount Outdoor Antenna (5 dBi) | 1 |
| Indoor Whip Antenna (3 dBi) | 1 |
| 5 m Low-Loss Coaxial Cable | 1 |
| 5V DC Car Power Adapter | 1 |
| Mounting Bracket & Cable Ties | 1 set |
| Quick Start Guide (English) | 1 |
Compatible UK Mobile Networks
The CVCD boosts Dual Band 20 & 3 (800 & 1800 MHz) 4G LTE, deployed by every major UK operator. Network-by-network compatibility:
| Network | Dual Band 20 & 3 (800 & 1800 MHz) 4G | VoLTE | CVCD Compatible |
|---|---|---|---|
| EE | Yes | Yes | Yes |
| O2 | Yes | Yes | Yes |
| Vodafone | Yes | Yes | Yes |
| Three | Yes (shared with O2 via MOCN) | Yes | Yes |
| BT Mobile (EE) | Yes | Yes | Yes |
| BT Mobile (EE) | Yes | Yes | Yes |
| Tesco Mobile (O2) | Yes | Yes | Yes |
| Lebara (Vodafone) | Yes | Yes | Yes |
| Lycamobile (O2) | Yes | Yes | Yes |
| Plusnet (EE) | Yes | Yes | Yes |
| ASDA Mobile (Vodafone) | Yes | Yes | Yes |
| ASDA Mobile (Vodafone) | Yes | Yes | Yes |
| iD Mobile (Three) | Yes | Yes | Yes |
| Vectone Mobile (EE) | Yes | Yes | Yes |
Pricing, Shipping & Returns
| Item | Detail |
|---|---|
| Current Price | £259.99 GBP (was £259.99.99 — save 18%) |
| UK Shipping | Free standard delivery, 10–15 business days |
| EU / Europe Shipping | Available to DE, FR, IT, ES, NL, BE, AT, SE, DK, FI, IE, PT, PL, CZ — 1–2 business days dispatch |
| Return Policy | 365-day money-back guarantee |
| Support | Lifetime technical support via email and chat |
| Payment | Credit / debit card, PayPal, Apple Pay, Google Pay |
Pros & Cons
An objective assessment based on the CVCD's hardware, price point and vehicle use case.
Pros
- Purpose-built for vehicles: Magnetic roof antenna, 5V DC car power adapter and compact booster unit designed for in-car use.
- All-network Dual Band 20 & 3 support: Dual Band 20 & 3 900/1800 MHz covers EE, O2, Vodafone, Three and all MVNOs plus their MVNOs — one device for all UK networks.
- Plug-and-play install: Magnetic antenna sticks to the roof in seconds; most users complete setup in under 15 minutes.
- Up to 5 bars in-vehicle: In areas with at least 1 bar outdoor signal, the CVCD delivers full bars inside the cabin or caravan.
- Multiple simultaneous users: No per-device limit — driver, passengers and caravan occupants can all connect.
- 365-day money-back guarantee: Longer than the industry-standard 30–90 day return window.
- Free UK shipping: No hidden delivery costs.
- Ofcom licence-exempt: Operates within UK mobile repeater regulations.
Cons
- Dual-band (2G+4G) (Dual Band 20 & 3): Does not boost 5G, 3G or higher 4G bands (Band 3 / 7 / 38). In areas with no 900/1800 MHz 4G, coverage is limited.
- 100 m² max coverage: Covers a car cabin or small caravan; large motorhomes may need an extended antenna kit.
- Requires at least 1 bar outdoors: A booster cannot create signal where none exists — the magnetic antenna must receive a usable signal.
- Standard cable is 5 m: Larger vehicles or caravans may need a cable extension.
- No built-in LCD / signal meter: Uses LED indicators only — fine for most users but less precise for optimisation.
- Standard delivery 10–15 days: Not next-day; express delivery available at extra cost.
- 5V DC only (included): For 240 V mains use in a static caravan, an optional AC adapter is needed.
How the CVCD Works
The CVCD is a bidirectional RF repeater designed for mobile environments. Three-step signal path:
- Capture: The magnetic-mount outdoor antenna on the vehicle roof picks up the weak 900/1800 MHz 4G LTE signal from the nearest mast.
- Amplify: The booster unit filters and amplifies both downlink (tower-to-phone) and uplink (phone-to-tower) signals by 45/50 dB.
- Redistribute: The indoor whip antenna rebroadcasts the amplified signal inside the vehicle cabin or caravan, and relays phone signals back to the mast.
Installation Steps (Under 15 Minutes)
- Find the strongest signal spot on the vehicle roof (usually the centre or front) using your phone's signal bars.
- Place the magnetic-mount outdoor antenna on the roof at that spot. The magnet holds it securely at motorway speeds.
- Run the 5 m cable from the roof antenna through the door seal or window into the vehicle.
- Place the booster unit under a seat or in the glove compartment. Screw on the indoor whip antenna.
- Plug the 5V DC adapter into the cigarette-lighter socket. The LED indicators will show power and signal status.
- Wait 30–60 seconds for sync, then test signal bars on your phone inside the vehicle.
Frequently Asked Questions (10 Real UK User Questions)
1. Does the CVCD work with 5G?
No. The CVCD is a 4G LTE Dual Band 20 & 3 (800 & 1800 MHz) booster only. It does not amplify 5G frequencies. However, 4G LTE remains the primary voice and data layer for most UK users on the move, and VoLTE calls work perfectly. For 5G boosting in vehicles, consider a multi-band 5G vehicle booster.
2. Will this booster work in my car on EE, O2, Vodafone or Three?
Yes. EE and Vodafone use Dual Band 20 & 3 (800 & 1800 MHz) for 4G LTE coverage on UK roads. The CVCD is compatible with EE, O2, Vodafone, Three and all their MVNOs (BT, ASDA, Virgin, Orange, T-Mobile, Plusnet, TPO). O2 and Three use different bands (Band 3/20) and are not supported.
3. Can I use the CVCD in a caravan or motorhome?
Yes. The CVCD is designed for cars, vans, motorhomes and static caravans. The magnetic antenna mounts on the roof of a motorhome or caravan, and the 5V DC adapter plugs into the vehicle's cigarette lighter. For static caravans with 240 V mains, an optional AC power adapter is available. The 100 m² coverage suits most caravan interiors.
4. Is a car mobile signal booster legal in the UK?
Yes, provided the device meets Ofcom's licence-exempt mobile repeater specifications. The CVCD is UKCA / CE certified and operates within Ofcom's Technical Standard for Mobile Repeaters, which permit licence-exempt use of repeaters that meet strict power and filtering limits. Uncertified, high-power boosters remain illegal.
5. Do I need an outdoor signal for the booster to work while driving?
Yes. A booster amplifies an existing signal — it cannot create one. You need at least 1 bar of usable 4G LTE (Dual Band 20 & 3) signal at the roof antenna. The CVCD works well while driving through rural areas with intermittent signal, as it continuously amplifies whatever signal the roof antenna receives. In complete blackspots with zero bars, no booster can help.
6. Will the magnetic antenna stay on at motorway speeds?
Yes. The magnetic-mount antenna is designed for vehicle use at UK motorway speeds (up to 70 mph / 113 km/h). The strong neodymium magnet holds firmly to steel roofs. For aluminium or fibreglass roofs (common on some caravans and motorhomes), use the included adhesive mounting pad or the optional permanent screw-mount bracket.
7. Can multiple passengers use the boosted signal at the same time?
Yes. The CVCD supports 15 simultaneous users and devices. There is no per-device cap — the driver and all passengers can make calls, stream music and browse simultaneously. Performance depends on the available mast bandwidth, not the booster itself.
8. How is the CVCD different from a home booster like the C100?
The CVCD uses a 5V DC car power adapter and a magnetic-mount roof antenna designed for vehicles, while the C100 uses a 240 V mains adapter and a wall-mounted outdoor antenna for fixed buildings. Both boost the same Dual Band 20 & 3 2G+4G frequency with 45/50 dB gain. The CVCD is for cars, vans and caravans; the C100 is for homes and offices.
9. What is the return policy and warranty?
The CVCD comes with a 365-day money-back guarantee — if you are not satisfied, return it within 365 days for a full refund. Boost4U also provides lifetime technical support via email and live chat. The hardware is covered by a standard manufacturer warranty against defects.
10. How long does UK delivery take and is shipping free?
Standard UK shipping is free and takes 10–15 business days. Orders are dispatched within 1–2 business days. Express / expedited delivery is available at checkout for an additional fee. EU and European orders (DE, FR, IT, ES, NL, BE, AT, SE, DK, FI, IE, PT, PL, CZ) are also accepted with 1–2 business day dispatch.
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Why You'll Love It
Powerful Signal Boost
Easy Installation
Networks Supported
Fast Speeds
Crystal Clear Calls
Wide Coverage Area
Award-Winning Signal Booster
2026 Winner
Smart Features, Made Simple
Easy Setup
Smart Technology
Energy Efficient
Reliable Performance
24/7 Support
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