# Calls - Car Vehicle Caravan (EE/ASDA/BT) Mobile Signal Booster

# Boost4U CVD — Car Mobile Signal Booster for Calls UK

**The Boost4U CVD (£139.99) is a Band 3 (1800 MHz) in-vehicle mobile signal booster that amplifies 2G GSM voice calls and SMS for EE, BT, ASDA, T-Mobile, TPO, Virgin Mobile, TalkMobile, TalkTalk and Orange networks inside cars, vans, trucks, motorhomes and boats, with 10 dB uplink / 10 dB downlink gain, ≥ 27 dBm output, support for 10 simultaneous users, a magnetic-mount external aerial, an interior antenna and a 5V DC car power adapter, providing reliable hands-free calls and text messaging while driving across rural and urban UK roads.**

Designed specifically for UK drivers who suffer from dropped calls, "No Service" errors and unsent texts while on the move, the CVD captures weak 1800 MHz Band 3 signals through a roof-mounted external aerial, amplifies them inside the vehicle cabin, and rebroadcasts a strong signal to all passengers' phones. Unlike home boosters, the CVD is compact, 12V/5V powered, and engineered for the unique signal challenges of moving vehicles — metal bodywork, tinted windows, rural dead zones and motorway blackspots.

##### **Enhanced Signal Strength**

  

Experience crystal-clear calls and fast 4G/LTE data with our mobile signal booster. Designed for vehicles, it amplifies weak signals, ensuring you stay connected even in remote areas.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Feature](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Feature1.webp?v=1780294389)

##### **User-Friendly Installation**

  

No technical expertise required! Our mobile signal booster comes with a complete kit and straightforward instructions, allowing for quick and hassle-free installation in your car or caravan.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Feature](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Feature2.webp?v=1780294389)

##### **Multi-Device Compatibility**

  

Support up to 10 devices simultaneously, making it perfect for families or groups traveling together. Enjoy uninterrupted connectivity for everyone on board.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Feature](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Feature3.webp?v=1780294389)

##### **Compact and Portable Design**

  

With a sleek, compact design, this booster is easy to carry and fits seamlessly into any vehicle. Its small size does not compromise its powerful performance.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Feature](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Feature4.webp?v=1780294389)

##### **Automatic Signal Adjustment**

  

Equipped with automatic gain control, the booster optimizes signal strength based on external conditions, ensuring consistent performance without manual adjustments.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Feature](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Feature5.webp?v=1780294389)

##### **Eco-Friendly Operation**

  

Designed with low radiation emissions, our mobile signal booster not only enhances your connectivity but also minimizes potential harm to your health, making it a safe choice for all users.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Feature](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Feature6.webp?v=1780294389)

## **3 Steps to Full Bars**

## 1\. Place the Outdoor Antenna

Mount the antenna where you get the best signal.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Install](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Install1.webp?v=1780294387)  
  

## 2\. Connect the Booster Inside

Plug in the booster and connect to the antenna.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Install](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Install2.webp?v=1780294387)  
  

## 3\. Enjoy Full Bars Everywhere

Clear calls, fast data, and no more dead zones.  
![Car Vehicle Mobile Phone Signal Booster Improve Signal Install](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Car-Signal-Booster-Install3.webp?v=1780294387)  
  

## Mobile Signal Booster Car Signal Booster EE Mobile Booster BT Mobile Booster ASDA Mobile Booster 4G LTE Booster Vehicle Signal Amplifier UK Mobile Signal Enhancement

It boost **Calls & 4G/LTE** signal on 1800MHz frequency, the frequency used in UK used by mobile networks to deliver their mobile services: 2G (also known as GSM) and 4G. It can boost all networks on EE, BT, Asda, Virgin, The People's Operator, Orange, T-Mobile for improving **Voice Calls & Text** signal. It also can boost all networks on Three, EE, BT, Asda, Virgin, iD Mobile, Freedom Pop, Orange, Plusnet, Smarty Mobile, T-Mobile and The People's Operator 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.

* * *

**Clear Voice**  
No Miss Important Calls  
**Wow 2G/4G Calls**  
Eliminates Dropped Calls

**Send/Receive SMS**  
SMS Text Messages Quickly  
**Consistent Connection**  
Reliable 4G/LTE Data

**Signal Wider Coverage**  
Vehicle Signal Improved  
**4G/LTE Internet**  
Faster Uploads & Downloads

* * *

  

### 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.  
![mobile phone signal booster for car vehicle Upgrade External Aerial of fishtail aerial bottom](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageFishtailAerialUpgradedBottom.webp?v=1600636900)  
![mobile phone signal booster for car vehicle Upgrade External Aerial of fishtail aerial](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageFishtailAerial.webp?v=1600636899)

* * *

### 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.

![mobile phone signal booster for car vehicle 01](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageCV01.webp?v=1600636899)  
![mobile phone signal booster for car vehicle 02](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageCV02.webp?v=1600636900)

* * *

  

### Specification

(scroll to view all)

Application & Bands

\[Car, Vehicle 4G/LTE & Voice Calls\] (Band 3)

Country

United Kingdom

**Boost All On**

EE (2G & 4G)  
Three (4G)  
ASDA (2G & 4G)  
BT (2G & 4G)  
Freedom Pop (4G)  
iD Mobile (4G)  
Orange (2G & 4G)  
Plusnet Mobile (4G)  
Smarty Mobile (4G)  
The People's Operator (2G & 4G)  
T-Mobile (2G & 4G)  
Virgin (2G & 4G)

Users Supporting

10 Simultaneously

Band

Single Band 3

Frequency

1800MHz

Gain(dB)

Uplink 10; Downlink 10

Up-link

1710~1785 MHz

Down-link

1805~1880 MHz

Export Power(Po)

≥27dBm

Power Adapter

5V DC

What’s Included

1 x Car Signal Booster / Amplifier  
1 x External Aerial  
1 x Interior Aerial  
1 x 5V DC Car Power Adapter

**Warming Tips:**  
-   Band Confirmation: This booster can boost signals on Band 3, please check the band of your devices firstly.
-   For iPhone: Dial \*3001#12345#\* → Press call button → Click 'Serving Cell Info' → Check 'Freq Band Indicator'.
-   For Android: Download 'LTE Discovery' APP → Click ‘SIGNALS’ → Check 'EARFCN'. More refer to [Quick Start Guide](https://www.ukmobilebooster.com/pages/quick_start_guide) .
-   External Signal Needed: The signal booster can only amplify signal but can't create signal. If there is no signal outside, it won't work, please make sure you get 1-2 bars signal outside.

  

### **How It Works**

  

![how mobile phone signal booster work for Car Vehicle](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageHIWcar-2.webp?v=1650634397)

#### 1

**Receives signal**  
The powerful antenna reaches out to access a voice and 3G, 4G, and LTE data signal, and delivers it to the booster  

#### 2

**Boosts signal**  
The booster receives the signal, amplifies it, and serves as a relay between your phone and the nearest cell tower.  

#### 3

**Broadcasts signal**  
Your devices get increased cell reception, and calls and data are fed through the booster back to the network.  
  

1.  Outside Antenna: Pulls in tower Signal.
2.  Signal Booster: Amplifies the Signal.
3.  Inside Antenna: Re-broadcasts Signal.
4.  Mobile Phone: Gets Boosted Signal.

![how mobile phone signal booster work for Car Vehicle](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPagehowitworksvehicles.webp?v=1600636900)

#### **Installation**

1.  Mount external aerial on top back.
2.  Install the booster and interior antenna.
3.  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.](https://drive.google.com/file/d/1Uch5legGJsKTzLO9PTGpgsKEnZGEq7TH/view)

![how mobile phone signal booster work for Car Vehicle](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageCarVehicle02.webp?v=1600636900)

  

### **Application Scenarios**

  

![mobile phone signal booster vehicle car truck suv van application](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/application-vehicle-car.jpg?v=1698366474)

![mobile phone signal booster vehicle car truck suv van application](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/application-vehicle-truck.jpg?v=1698366474)

![mobile phone signal booster vehicle car truck suv van application](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/application-vehicle-suv.jpg?v=1698366473)

![mobile phone signal booster vehicle car truck suv van application](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/application-vehicle-van.jpg?v=1698366473)

## Full Technical Specifications

Parameter

Value

Model

CVD / MBCVDgb

Application

Car, Van, Truck, Motorhome, Boat, Vehicle

Frequency Band

Band 3 (1800 MHz) FDD GSM

Uplink Frequency

1710 – 1785 MHz

Downlink Frequency

1805 – 1880 MHz

Supported Services

2G GSM (Voice Calls & SMS)

Uplink Gain (Gp)

≥ 10 dB

Downlink Gain (Gp)

≥ 10 dB

Max Output Power (Po)

≥ 27 dBm

Simultaneous Users

Up to 10

Supported Networks (2G)

EE, BT, ASDA, T-Mobile, TPO, Virgin Mobile, TalkMobile, TalkTalk, Orange

External Aerial

Magnetic-mount, roof/bonnet placement

Interior Aerial

Compact cabin antenna

Power Adapter

5V DC car cigarette lighter / USB

Power Consumption

≤ 5 W

Operating Temperature

\-20°C to +60°C

Certification

UKCA / CE, Ofcom Licence-Exempt

Price

£139.99 GBP

## What's in the Box

Item

Quantity

Description

CVD Car Booster Unit

1

Compact Band 3 amplifier with LED indicators

External Aerial

1

Magnetic-mount, roof/bonnet, weatherproof

Interior Aerial

1

Compact cabin antenna, adhesive mount

5V DC Car Power Adapter

1

Cigarette lighter / USB power

Cable Set

1

Connection cables for aerial and booster

User Manual

1

Step-by-step vehicle installation guide

## How the CVD Works in Your Vehicle

1.  **Receives:** The magnetic-mount external aerial on the roof captures weak 1800 MHz Band 3 signal from the nearest EE/BT mast, even while driving.
2.  **Amplifies:** The compact booster unit amplifies the signal by 10 dB (uplink) and 10 dB (downlink), filtering out noise and interference.
3.  **Broadcasts:** The interior aerial rebroadcasts the boosted signal throughout the vehicle cabin, reaching all passengers' phones.
4.  **Returns:** Uplink signals from passengers' phones are amplified and sent back to the mast via the external aerial.

## Compatible Vehicles

Vehicle Type

Suitability

Notes

Cars / Saloons / Hatchbacks

Excellent

Standard installation, magnetic roof aerial

SUVs / 4x4s

Excellent

Larger cabin, interior aerial on dashboard

Vans / Delivery Vehicles

Very Good

External aerial on roof, interior in cab

Trucks / HGVs

Very Good

24V adapter may be needed (check)

Motorhomes / Campervans

Excellent

Can be semi-permanent installed

Caravans

Good

Works when towed, external aerial on roof

Boats / Narrowboats

Good

Marine environment, ensure waterproof connections

Taxis / Private Hire

Excellent

Reliable calls for drivers and passengers

## Pros & Cons

### Advantages

-   **Vehicle-specific design:** The only booster in the Boost4U range designed for cars, vans and motorhomes.
-   **Band 3 1800 MHz:** Best building/vehicle penetration band; works with EE, BT and all their MVNOs.
-   **Improves calls & SMS:** Eliminates dropped calls and unsent texts while driving.
-   **10 simultaneous users:** Enough for all passengers in a car or van.
-   **5V DC car power:** Plugs into cigarette lighter or USB — no mains needed.
-   **Magnetic external aerial:** Quick installation on roof or bonnet, no drilling.
-   **Compact size:** Booster unit fits under seat, in glove box or on dashboard.
-   **Ofcom legal:** Licence-exempt, UKCA/CE certified, automatic gain control.
-   **Affordable:** At £139.99, one of the cheapest vehicle call boosters in the UK.
-   **365-day returns:** Longest money-back guarantee in the market.

### Disadvantages

-   **2G calls only:** Does NOT boost 4G data or 3G. Only voice calls and SMS on Band 3.
-   **Not for EE/Three:** Band 3 is used by EE/BT. EE and Three use different bands for calls.
-   **Requires outdoor signal:** Must have 1–2 bars outside the vehicle. Cannot create signal from nothing.
-   **Signal varies while driving:** As you move between masts, signal strength fluctuates. The booster handles this but may have brief dropouts in very remote areas.
-   **External aerial on roof:** Magnetic mount may not adhere to glass roofs or non-metal body panels.
-   **Standard delivery 10–15 days:** Not next-day delivery.
-   **No 5G support:** No consumer booster currently supports 5G.
-   **Installation in vehicle:** Requires routing cables from roof to cabin, which may be tricky in some vehicles.
-   **5V power only:** May need adapter for 24V truck systems.
-   **Metal vehicle body:** The car body itself blocks signal — the external aerial must be outside (on roof) to work.

## Supported Networks Detail

Network

2G Calls/SMS on Band 3

Notes

Network

2G Calls

4G Data

Notes

EE

Yes

Yes

Primary network, full Band 3 support

BT Mobile

Yes

Yes

Uses EE infrastructure

ASDA Mobile

Yes

Yes

Uses EE infrastructure

Virgin Mobile

Yes

Yes

Uses EE infrastructure (from 2024)

Orange

Yes

Yes

Legacy EE brand

T-Mobile

Yes

Yes

Legacy EE brand

The People's Operator (TPO)

Yes

Yes

Uses EE infrastructure

Three

No (no 2G)

Yes

4G data only on Band 3

iD Mobile

No (no 2G)

Yes

Uses Three infrastructure, 4G only

Smarty

No (no 2G)

Yes

Uses Three infrastructure, 4G only

Plusnet Mobile

No (no 2G)

Yes

Uses EE infrastructure, 4G only

Freedom Pop

No (no 2G)

Yes

Uses Three infrastructure, 4G only

O2

No

No

Uses Band 8/20, not supported

Vodafone

No

No

Uses Band 8/20, not supported

## Installation Guide for Vehicles

1.  **Find the signal:** Park in an area with 1–2 bars of EE/BT signal. Use your phone to confirm Band 3 (1800 MHz) is available.
2.  **Mount external aerial:** Place the magnetic-mount aerial on the centre of the vehicle roof (best signal) or on the bonnet. Ensure it is flat and secure.
3.  **Route cable:** Run the aerial cable through the door rubber seal or window gap into the cabin. Avoid pinching the cable.
4.  **Connect booster:** Plug the external aerial cable into the "BS" port on the booster unit. Connect the interior aerial to the "MS" port.
5.  **Place interior aerial:** Position the interior aerial on the dashboard or under a seat, facing the passenger area.
6.  **Power on:** Plug the 5V DC adapter into the cigarette lighter or USB port. The booster will calibrate automatically (10–15 seconds).
7.  **Test:** Check signal bars on your phone. Make a test call. Adjust aerial position if needed.

**Installation time:** 15–30 minutes. **Tools needed:** None (magnetic mount, no drilling). Cable ties recommended for neat cable routing.

## Frequently Asked Questions

### Will the CVD work in my car?

Yes, the CVD works in any car, van, truck or motorhome with a 12V/5V power outlet and a metal roof for the magnetic aerial. It supports EE, BT and all their MVNOs (ASDA, Sky, T-Mobile, TPO, Tesco, TalkTalk, TalkMobile). You need at least 1–2 bars of outdoor signal.

### Does the CVD improve 4G data in the car?

No. The CVD is a Band 3 (1800 MHz) 2G booster that improves voice calls and SMS only. It does not boost 4G LTE data. For in-car 4G data, consider a mobile WiFi hotspot or a 4G router with external antenna.

### Will it work with EE or Three?

No. The CVD operates on Band 3 (1800 MHz), which is used by EE and BT for 2G calls. EE uses Band 3 (1800 MHz) and Three does not operate a 2G network. The CVD will not improve EE or Three calls.

### How is the CVD powered?

The CVD uses a 5V DC car power adapter that plugs into the vehicle's cigarette lighter socket or USB port. It consumes approximately 5 W, so it will not drain your car battery when the engine is running. Turn it off when the engine is off to avoid battery drain.

### Is the CVD legal to use while driving?

Yes. The CVD is Ofcom licence-exempt with UKCA/CE certification. It operates within Ofcom's power limits and includes automatic gain control to prevent network interference. It is legal to use in any vehicle on UK roads.

### Do I need to drill holes in my car?

No. The external aerial uses a strong magnetic mount that attaches to the vehicle roof or bonnet. The cable routes through the door rubber seal. No drilling or permanent modification is required.

### Will the magnetic aerial damage my car paint?

The magnetic aerial has a rubberised base that protects the paintwork. It is designed for temporary or permanent vehicle use. For long-term installation, we recommend periodically cleaning under the aerial to prevent dirt buildup.

### How much does the CVD cost?

£139.99 GBP including the booster unit, external magnetic aerial, interior aerial, 5V DC car power adapter, cables and user manual. Free UK shipping. 365-day money-back guarantee included.

### What if it doesn't work in my vehicle?

The CVD comes with a 365-day money-back guarantee. If it does not improve your in-car signal for any reason within 365 days, return it for a full refund (minus shipping costs). Most signal issues are resolved by repositioning the external aerial.

### Can I use the CVD in a motorhome or caravan?

Yes. The CVD works well in motorhomes, campervans and caravans. For permanent installation in a motorhome, you can mount the external aerial on the roof and route cables internally. The 5V adapter works from the vehicle's leisure battery or cigarette lighter.

## Related Blog Articles

-   [Best Car Mobile Signal Booster UK 2025 — Comparison & Reviews](https://www.ukmobilebooster.com/en-gb/blogs/news/cvd-best-car-mobile-signal-booster-uk-2025-complete-comparison-reviews)
-   [Boost4U CVD Review UK — In-Car Call Booster Tested](https://www.ukmobilebooster.com/en-gb/blogs/news/boost4u-cvd-review-uk-21-day-in-car-call-booster-test)
-   [How to Boost EE Signal in Car UK — Complete Guide](https://www.ukmobilebooster.com/en-gb/blogs/news/how-to-boost-ee-signal-in-car-uk-complete-guide-2025)
-   [Band 3 1800MHz Car Signal Booster for EE BT ASDA UK](https://www.ukmobilebooster.com/en-gb/blogs/news/band-3-1800mhz-car-signal-booster-for-ee-bt-asda-uk-full-technical-guide)

 

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## Details

- **Price:** 139.99 GBP - 167.56 GBP
- **Vendor:** UKMobileBooster.com
- **Type:** United Kingdom
- **Tags:** application 4G LTE Data & Voice Calls, application vehicle, application Voice Calls, frequency 1800MHz, gb asda, gb bt, gb ee, gb gb, gb orange, gb t-mobile, gb The People's Operator, gb virgin, has_stock_countdown, provider 1p mobile, provider Asda, provider BT, provider EE, provider Orange, provider T-Mobile, provider The People's Operator, provider Virgin, sale

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| No | 139.99 GBP | In stock |
| Yes | 167.56 GBP | In stock |

## Images

- A mobile signal booster kit including a rectangular signal booster unit, an external whip antenna, and an internal panel antenna, along with cables for connection. Boost4U CVD Car Signal Booster | Band 3 1800MHz In-Car Calls | £139.99
- Before and after comparison of a phone with dropped calls and full signal strength on a scenic road. Car Vehicle Mobile Phone Signal Booster Improve Signal
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> Source: [B4U](https://www.ukmobilebooster.com/products/cvd-mobile-booster)
> Updated: 2026-09-16