# 3G - 250m2 (Sercomtel) Cell Phone Signal Booster ##### **Robust Signal Amplification** Experience uninterrupted connectivity with the 3G - 250m2 (Sercomtel) Cell Phone Signal Booster. Designed to operate on the 850MHz frequency, it enhances 3G signals effectively, providing reliable communication and data coverage in spaces up to 250 square meters. Whether at home, in cafes, or offices, ensure that you never miss a call or message. ##### **Comprehensive Installation Kit** This booster comes with everything you need for a hassle-free installation. The all-inclusive kit features an external aerial, cables, a booster unit, an internal aerial, and a power adapter. You'll have all necessary peripherals bundled for one price, allowing for a simple, straightforward setup. ##### **Multiple Users Supported** Stay connected with ease! This booster supports up to 25 simultaneous users, making it perfect for homes or small businesses. Everyone can enjoy improved call quality and data speeds without the worry of being cut off or experiencing slow connections. ##### **Upgrade Options Available** Customize your setup with optional upgrades! Enhance your performance with a higher-gain Yagi antenna or a lightning surge protector to keep your equipment safe. Choose the right external cables for any setting, ensuring you maximize your signal strength wherever needed. ##### **Cutting-Edge Technology** Equipped with advanced technology, this signal booster successfully amplifies weak signals, giving you the clarity and reliability necessary for modern connectivity. Say goodbye to dropped calls and sluggish data speeds; stay connected effortlessly. ##### **User-Friendly Operation** Setting up the 3G - 250m2 booster is a breeze! Follow our easy installation guide for a smooth process. With a 'loose' install option, you can adjust components for optimal performance before finalizing placement—meaning you can boost your signal quickly and efficiently. It boost **3G** signal on 850MHz frequency, the frequency used in **Brazil** used by mobile networks to deliver their mobile services: 3G. It work on 850Mhz (Band 5) frequency can boost Sercomtel mobile operator 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 \[3G Data\] (Band 5) Country Brazil **Boost All On** Sercomtel (3G) Users Supporting 25 Simultaneously Band Single Band 5 Frequency 850MHz Gain(dB) Uplink Gp≥55; Downlink Gp≥60 Up-link 824~849 MHz Down-link 869~894 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 5, 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 a Cell Phone Signal Booster? - A Cell Phone Signal Booster is a device that helps improve your mobile phone signal. It works by picking up weak signals from outside, amplifying (or making stronger) that signal, and then sending it inside your house or building. If you often struggle with dropped calls or slow internet, a signal booster can help make your connection clearer and faster. 2. How does the 3G - 250m2 (Sercomtel) Cell Phone Signal Booster work? - The 3G - 250m2 (Sercomtel) Cell Phone Signal Booster enhances your mobile signal on the 850MHz frequency, which is commonly used in Brazil. By capturing outside signals, it boosts the signal strength inside your home or business, making sure you can enjoy clearer calls and better data speeds over an area of up to 250 square meters. 3. Is the 3G Cell Phone Signal Booster easy to install? - Yes, the 3G Cell Phone Signal Booster is designed for easy installation. The package comes with all the necessary parts including antennas, cables, and a power adapter. You just need to follow a few simple steps: install the outside antenna, connect it with the booster using the provided cable, and place the indoor antenna to spread the signal around. 4. Do I need to have a good signal outside to use the booster? - Yes, this booster can only make weak signals stronger, but it cannot create a signal if there is none outside. So, if you check that your outside signal is weak or non-existent, you may want to adjust the placement of the outdoor antenna to find a better spot, or consider contacting your service provider. 5. How many users can connect to the booster at the same time? - The 3G - 250m2 (Sercomtel) Cell Phone Signal Booster can support up to 25 users simultaneously. This means that multiple devices, such as mobile phones and tablets, can connect and enjoy improved signal strength at the same time. 6. What should I do if I don't see improvements in my signal after installation? - If you don't experience any improvements, first check that the outdoor antenna is mounted in an area with the best possible signal. You might also want to ensure that all connections are secure. If issues persist, you can reach out to support for troubleshooting assistance to evaluate the problem. 7. Can I use the booster for signals other than 3G? - The 3G - 250m2 (Sercomtel) Cell Phone Signal Booster is specifically designed to amplify 3G signals. If you need coverage for 2G or 4G networks, you may want to look for a dual-band or multiband booster that can handle multiple frequencies. 8. What is the frequency range of this booster? - This specific signal booster operates on an 850MHz frequency, which is used by certain mobile networks in Brazil for 3G services. Ensure that your mobile carrier operates within this frequency range to benefit from improved signals. 9. Is there a warranty for the booster? - Yes, many signal boosters come with a warranty to protect your purchase. Always check the product details on the website or ask customer service to understand the warranty coverage and duration, so you feel secure with your purchase. 10. Where can I buy the 3G - 250m2 (Sercomtel) Cell Phone Signal Booster? - You can purchase the 3G - 250m2 (Sercomtel) Cell Phone Signal Booster directly from the UK Mobile Booster website. It is easy to find and simply click 'Add to Cart' to complete your order. TAGES: 3G cell phone signal booster, mobile signal booster, Sercomtel signal booster, 250m2 coverage, improve signal strength, indoor antenna, frequency 850MHz, cell phone signal booster kit ## 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, frequency 850MHz, provider Sercomtel ## 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 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster - 3G - 250m2 (Sercomtel) Cell Phone Signal Booster --- > Source: [B4U](https://www.ukmobilebooster.com/products/br-t250-mobile-booster) > Updated: 2026-09-02