Calls - Car Vehicle Caravan (O2/Vodafone/giffgaff/Sky Mobile) Mobile Signal Booster
✓ Compatible with multiple users and devices
✓ Complete kit: all parts included
✓ Simpler Install and Maintenance
Enhance mobile signal strength on the go with our wide range of products, including mobile and car signal boosters for O2, Vodafone, and Giffgaff networks in the UK. Improve the quality of voice calls, boost signal reception in vehicles, and set up an external aerial easily with our 900MHz frequency boosters.
Boost4U CVG — Car Mobile Signal Booster for Calls UK
The Boost4U CVG (£109.99) is a Band 8 (900 MHz) in-vehicle mobile signal booster that amplifies 2G GSM voice calls and SMS for O2, Vodafone, giffgaff, Lebara, Lycamobile, Sky Mobile, TalkMobile, TalkTalk and Tesco Mobile networks inside cars, vans, trucks, motorhomes and boats, with 45 dB uplink / 40 dB downlink gain, 10 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 CVG captures weak 900 MHz Band 8 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 CVG 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.
Compact Design
The Calls - Car Vehicle Caravan Mobile Signal Booster boasts a sleek, compact design, similar to a cigarette box. This makes it easy to carry and perfect for various small spaces, ensuring you can enjoy better signal coverage wherever you go.
User-Friendly Installation
Say goodbye to complicated setups! This mobile signal booster is designed for effortless installation, allowing you to enhance your mobile signal without the need for professional help. Just plug it in and enjoy improved connectivity.
Automatic Signal Adjustment
Equipped with automatic gain control, this booster intelligently adjusts its performance based on external signal strength. This ensures optimal signal amplification, providing you with a reliable connection at all times.
Versatile Power Options
The booster offers flexible power options, including a 5VAC adapter, mobile power, and vehicle power adapter. This versatility allows you to use it in various settings, whether at home, in your car, or on the go.
Health-Conscious Technology
With its low radiation design, this mobile signal booster not only enhances your signal but also reduces the radiation intensity emitted by your phone. Enjoy better connectivity while prioritizing your health and safety.
Eco-Friendly Operation
Designed with environmental protection in mind, the booster can be easily unplugged when not in use, eliminating unnecessary radiation and energy consumption. Stay connected while being kind to the planet.
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.
Mobile Signal Booster, Car Signal Booster, O2 Vodafone Giffgaff, UK Mobile Network, Voice Calls Amplifier, Vehicle Signal Improvement, 900MHz Frequency Booster, External Aerial Installation
It boost Calls signal on 900MHz frequency, the frequency used in UK used by mobile networks to deliver their mobile services: 2G (also known as GSM). It can boost all networks on O2, Vodafone, giffgaff, TalkTalk, Lyca Mobile, Lebara, Tesco, Talk and Sky Mobile for improving Voice Calls & Text signal.
No Miss Important Calls
SMS Text Messages Quickly
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 Voice Calls (Band 8) |
| Country | United Kingdom |
| Boost All On | O2 (2G) Vodafone (2G) giffgaff (2G) Lebara (2G) Lyca Mobile (2G) Sky Mobile (2G) TalkMobile (2G) TalkTalk (2G) Tesco (2G) |
| Users Supporting | 10 Simultaneously |
| Band | Single Band 8 |
| Frequency | 900MHz |
| Gain(dB) | Uplink 45±2; Downlink 40±2 |
| Up-link | 890~915 MHz |
| Down-link | 935~960 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 Interior 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
Full Technical Specifications
| Parameter | Value |
|---|---|
| Model | CVG / MBCVGgb |
| Application | Car, Van, Truck, Motorhome, Boat, Vehicle |
| Frequency Band | Band 8 (900 MHz) FDD GSM |
| Uplink Frequency | 890 – 915 MHz |
| Downlink Frequency | 935 – 960 MHz |
| Supported Services | 2G GSM (Voice Calls & SMS) |
| Uplink Gain (Gp) | 45 ± 2 dB |
| Downlink Gain (Gp) | 40 ± 2 dB |
| Max Output Power (Po) | Uplink 10 dBm / Downlink 10 dBm |
| Simultaneous Users | Up to 10 |
| Supported Networks (2G) | O2, Vodafone, giffgaff, Lebara, Lycamobile, Sky Mobile, TalkMobile, TalkTalk, Tesco Mobile |
| 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 | £109.99 GBP |
What's in the Box
| Item | Quantity | Description |
|---|---|---|
| CVG Car Booster Unit | 1 | Compact Band 8 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 CVG Works in Your Vehicle
- Receives: The magnetic-mount external aerial on the roof captures weak 900 MHz Band 8 signal from the nearest O2/Vodafone mast, even while driving.
- Amplifies: The compact booster unit amplifies the signal by 45 dB (uplink) and 40 dB (downlink), filtering out noise and interference.
- Broadcasts: The interior aerial rebroadcasts the boosted signal throughout the vehicle cabin, reaching all passengers' phones.
- 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 8 900 MHz: Best building/vehicle penetration band; works with O2, Vodafone 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 £109.99, 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 8.
- Not for EE/Three: Band 8 is used by O2/Vodafone. 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 8 | Notes |
|---|---|---|
| O2 | Yes | Primary network, full Band 8 support |
| Vodafone | Yes | Primary network, full Band 8 support |
| giffgaff | Yes | Uses O2 infrastructure |
| Lebara | Yes | Uses Vodafone infrastructure |
| Lycamobile | Yes | Uses Vodafone infrastructure |
| Sky Mobile | Yes | Uses O2 infrastructure |
| TalkMobile | Yes | Uses Vodafone infrastructure |
| TalkTalk Mobile | Yes | Uses O2 infrastructure |
| Tesco Mobile | Yes | Uses O2 infrastructure |
| EE | No | EE uses Band 3 (1800 MHz) for 2G |
| Three | No | Three does not operate 2G on Band 8 |
Installation Guide for Vehicles
- Find the signal: Park in an area with 1–2 bars of O2/Vodafone signal. Use your phone to confirm Band 8 (900 MHz) is available.
- 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.
- Route cable: Run the aerial cable through the door rubber seal or window gap into the cabin. Avoid pinching the cable.
- Connect booster: Plug the external aerial cable into the "BS" port on the booster unit. Connect the interior aerial to the "MS" port.
- Place interior aerial: Position the interior aerial on the dashboard or under a seat, facing the passenger area.
- Power on: Plug the 5V DC adapter into the cigarette lighter or USB port. The booster will calibrate automatically (10–15 seconds).
- 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 CVG work in my car?
Yes, the CVG works in any car, van, truck or motorhome with a 12V/5V power outlet and a metal roof for the magnetic aerial. It supports O2, Vodafone and all their MVNOs (giffgaff, Sky, Lebara, Lycamobile, Tesco, TalkTalk, TalkMobile). You need at least 1–2 bars of outdoor signal.
Does the CVG improve 4G data in the car?
No. The CVG is a Band 8 (900 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 CVG operates on Band 8 (900 MHz), which is used by O2 and Vodafone for 2G calls. EE uses Band 3 (1800 MHz) and Three does not operate a 2G network. The CVG will not improve EE or Three calls.
How is the CVG powered?
The CVG 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 CVG legal to use while driving?
Yes. The CVG 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 CVG cost?
£109.99 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 CVG 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 CVG in a motorhome or caravan?
Yes. The CVG 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.
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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
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Easy Setup
Smart Technology
Energy Efficient
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