# 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster ##### **Powerful Signal Boosting** Experience the freedom of seamless communication with our 3G - 250m2 Cell Phone Signal Booster. Designed specifically to amplify 3G signals on a frequency of 2100MHz, this booster enhances your connection for Oi and Algar mobile networks, making dropped calls a thing of the past. ##### **Extensive Coverage Area** Transform your space into a connectivity haven! With the ability to boost signals over an impressive coverage area of up to 250 square meters, this device is perfect for homes, cafes, restaurants, clubs, and more, ensuring reliable access no matter where you are. ##### **Complete Kit for Easy Installation** Say goodbye to complicated setups! Our all-inclusive kit provides everything needed for a smooth installation process: an external antenna, cables, booster unit, indoor antenna, and power adapter—all at one price. Get connected quickly and effortlessly. ##### **Enhance Your Connectivity** Whether you’re streaming, browsing, or video chatting, our booster dramatically improves your 3G data connection. Enjoy faster download speeds and consistent connectivity that enhances your overall mobile experience—perfect for both personal and professional use. ##### **User-Friendly Design** Designed for simplicity, the installation process is straightforward. You can easily run cables, position antennas for optimal signal reception, and plug in the power supply without needing specialized skills, making it a user-friendly option for everyone. ##### **Upgrade Options Available** Tailor your signal boosting experience with available upgrades! Enhance your system with higher gain antennas or added surge protection to ensure your equipment remains safe and your signal remains strong, adapting to your specific needs. It boost **3G** signal on 2100MHz frequency, the frequency used in **Brazil** used by mobile networks to deliver their mobile services: 3G, 3.5G (also known as HSDPA provides faster data rates than 3G). It work on 2100Mhz (Band 1) frequency can boost Oi and Algar mobile carriers mainly used for improving **3G** signal. It is the best suitable for medium size, boost indoor signal areas up to **250 m2**, perfect for home, cafes, restaurants, pubs, clubs and more. * * * **Wow 3G Calls** Eliminates Dropped Calls **Consistent Connection** Reliable 3G Data **Signal Wider Coverage** Reception Up to 250 sq.m. * * * ### Upgrade External Cables If our standard package 10 meter external cable length is not enough to cover your area you have an upgrade option. ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal cables](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/Signal-Booster-Cable.jpg?v=1693125491) * * * ### Upgrade External Aerial Higher Gain Yagi Antenna - For better performance it's a must if indoor your phone with 1/2 signal bars. Or get this upgrade if outdoor best signal strength in the following range: 2G (GSM) -76 to -90 dBm 3G (UMTS) -80 to -94 dBm 4G (LTE) -97 to -105 dBm How to shown dBm reading on phone? Check [Quick Start Guide](https://www.ukmobilebooster.com/pages/quick_start_guide) ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal higher gain yagi antenna](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageHigherGainYagiAntenna.webp?v=1600640184) * * * ### Upgrade Protector Lightning Surge Protector - Designed to Protect your equipment from high amperage surges due to lightning strikes on aerials or masts in close proximity to the device. This unit is rated for 18KA of current surge and is very simple to install on any device. ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal surge protector](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageSurgeProtector.webp?v=1600640184) * * * ### Specification (scroll to view all) Application & Bands \[3G\] (Band 1) Country Brazil **Boost All On** Oi (3G) Algar (3G) Users Supporting 25 Simultaneously Band Single Band 1 Frequency 2100MHz Gain(dB) Uplink Gp≥55; Downlink Gp≥60 Up-link 1930~1990 MHz Down-link 2110~2180 MHz Export Power(Po) ≥17dBm Power Adapter Input: AC 100V~240V 50/60Hz Output: DC 5V Kit Includes 1 x Booster 1 x Outdoor Antenna 1 x Indoor Antenna 1 x Power Adapter 1 x 10 Meters Outdoor Cable **Warming Tips:** - Band Confirmation: This booster can boost signals on Band 1, 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. ### Custom your solution #### **Expandable coverage by adding indoor antenna if the outside signal is strong.** ![UK Mobile Booster Expand Cell Coverage with 3 Indoor Antennas](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/Expand-Cell-Coverage-with-3-Indoor-Antenna.png?v=1700361963) ### **How It Works** ![how 4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal work for home office](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageHIWhomeoffice-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. #### **Get stronger signal** ![how 4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal work for home office](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPagenormalcoverage-2.webp?v=1650634397) #### Normal Cell Coverage Dropped calls and slow data are generally caused by three things: distance from a cell tower, building materials in your home or office, or obstruction from tall objects such as trees, topography, and buildings. ![how 4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal work for home office](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/ProductPageboostedcoverage-2.webp?v=1650634397) #### Signal Coverage with our booster Signal boosters increase cell signal by collecting signals with a powerful antenna, delivering those signals to the booster, amplifying the cell signals so your devices receive them, and delivering your device's boosted signals back to the cell tower. #### **Installation** 1. Connect the indoor antenna to the MS port. 2. Connect the outdoor antenna to the BS Port. 3. Install the outdoor antenna and keep a minimum vertical distance of 10 meters from the indoor antenna. 4. Point the outdoor antenna to the direction where you know there is possibly a higher signal strength from the base station. 5. Power on the booster and check the signal strength. 6. Adjust the outdoor antenna until you get the best signal strength. **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) ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal signal coverage](https://cdn.shopifycdn.net/s/files/1/0488/4129/3976/files/Coverage.jpg?v=1698191834) ### **Application Scenarios** ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal home application](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/application-home.png?v=1697980834) **Home** ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal office application](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/application-office.png?v=1697980832) **Office** ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal garage application](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/application-garage.png?v=1697980834) **Garage** ![4G LTE Mobile Signal Booster UK Networks EE Vodafone O2 Indoor Coverage Improve Signal metal buildings application](https://cdn.shopify.com/s/files/1/0488/4129/3976/files/application-metal-buildings.png?v=1697980834) **Metal Buildings** 1. What is the 3G - 250m2 Cell Phone Signal Booster? - The 3G - 250m2 Cell Phone Signal Booster is a device that helps improve mobile phone reception in areas where the 3G signal is weak. It works specifically on the 2100MHz frequency, which is used by Brazil's mobile networks, including Oi and Algar. This booster can cover indoor areas of up to 250 square meters, making it ideal for homes, cafes, and restaurants. 2. How does a signal booster work? - A signal booster works by capturing the weak outside mobile signal with an external antenna. It then boosts that signal and distributes it through an internal antenna inside your building. This helps your phone get a better signal, making calls and using the internet much easier. 3. Can I install the booster myself? - Yes! The booster kit comes with all the cables and antennas you need to set it up. Most people can install it by following a quick guide. Just make sure to place the outdoor antenna where the signal is strongest, like on your roof. 4. What if there’s no signal outside? - If your outside location has no signal at all, the booster won't work because it can only amplify what it receives. It cannot create a signal on its own. You need to have at least a weak signal outside for it to function. 5. How can I check if my phone is on the right frequency band? - To find out if your phone is using the right frequency band, you can dial \*3001#12345#\* and press call. Then look for ‘Freq Band Indicator’ on your phone’s display. If it shows Band 1, it matches the booster’s frequency. 6. Can I use the booster for multiple users? - Yes! The 3G - 250m2 Booster can support up to 25 users at the same time. This is great for family use, small businesses, or anywhere more than one person needs a better signal. 7. What’s included in the booster kit? - The booster kit comes with everything you need: an outdoor antenna, an indoor antenna, a booster unit, a power adapter, and cables. This all-in-one package makes it easy to get set up and enjoy improved signal reception. 8. Do I need to upgrade the cables or antennas? - If the standard cables or antennas are not sufficient for your location, you have the option to upgrade to longer cables or a higher gain antenna for better signal performance. This can help if you're experiencing low reception. 9. What if I receive lightning at my location? - If you are concerned about lightning strikes, you can opt for a surge protector. This device will help protect your booster and antennas from any high voltage surge caused by lightning. 10. Is the booster easy to install? - Yes! The installation is quite simple. You just need to run the outdoor antenna to a spot with good reception, connect the cables to the booster inside, and plug it in. Following the setup steps in the manual can help you through the process. TAGES: 3G signal booster, mobile booster, Oi Algar, cell phone amplifier, indoor signal enhancement, Brazil mobile networks, signal booster installation, wireless data improvement ## Details - **Price:** 169.0 GBP - 289.0 GBP - **Vendor:** UKMobileBooster.com - **Type:** Brazil - **Tags:** application 3G Data, br br, coverage up to 250 sq metres, has_stock_countdown, provider Algar, provider Oi ## Variants | Variant | Price | Available | |---------|-------|-----------| | No / No / No | 169.00 GBP | In stock | | No / No / Yes | 189.00 GBP | In stock | | No / Yes / No | 219.00 GBP | In stock | | No / Yes / Yes | 239.00 GBP | In stock | | 20 M / No / No | 189.00 GBP | In stock | | 20 M / No / Yes | 209.00 GBP | In stock | | 20 M / Yes / No | 239.00 GBP | In stock | | 20 M / Yes / Yes | 259.00 GBP | In stock | | 30 M / No / No | 199.00 GBP | In stock | | 30 M / No / Yes | 219.00 GBP | In stock | | 30 M / Yes / No | 249.00 GBP | In stock | | 30 M / Yes / Yes | 269.00 GBP | In stock | | 40 M / No / No | 209.00 GBP | In stock | | 40 M / No / Yes | 229.00 GBP | In stock | | 40 M / Yes / No | 259.00 GBP | In stock | | 40 M / Yes / Yes | 279.00 GBP | In stock | | 50 M / No / No | 219.00 GBP | In stock | | 50 M / No / Yes | 239.00 GBP | In stock | | 50 M / Yes / No | 269.00 GBP | In stock | | 50 M / Yes / Yes | 289.00 GBP | In stock | ## Images - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster - 3G - 250m2 (Oi/Algar) Cell Phone Signal Booster --- > Source: [B4U](https://www.ukmobilebooster.com/products/br-w250-mobile-booster) > Updated: 2026-09-02