# Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster ##### **Enhanced Call Clarity** Experience crystal-clear voice calls with our dual-band booster that supports 850MHz and 1800MHz frequencies. Whether you're on Vivo or Sercomtel, enjoy uninterrupted conversations and never miss an important call again as this booster enhances your cellular reception. ##### **Broad Coverage Area** Our signal booster covers up to 250m², making it ideal for various environments such as homes, cafes, restaurants, and clubs. Ensure everyone in your space can enjoy reliable calls and fast data speeds without any dead zones. ##### **Supports Multiple Users** Have multiple users in your household or business? This booster can accommodate up to 25 simultaneous connections, providing everyone with superior coverage and improved signal strength. ##### **Battery Life Improvement** Reduce your device's battery drain by boosting the cell signal. Stronger connections lead to less battery usage, ensuring your phone stays powered for longer, even during lengthy calls. ##### **Fast Data Speeds** Boost your 3G and 4G LTE data signals effortlessly. Enjoy faster uploads and downloads, making streaming, browsing, and video calls smooth and hassle-free. ##### **Comprehensive Installation Kit** Everything you need is included in one affordable package: external aerial, booster unit, cables, and installation guides. With easy setup, you can start enjoying enhanced signals without any additional fuss. It boost **Calls and 3G and 4G LTE** signal on 850MHz, 1800MHz frequency, the frequencies used in **Brazil** used by mobile networks to deliver their mobile services: 2G. It work on both 850Mhz (Band 5) & 1800MHz (Band 3) frequencies mainly used for improving Vivo and Sercomtel mobile carrier networks **Voice Calls & Text** signal. It also boost Sercomtel mobile carrier for improving **3G** signal, and boost Vivo, TIM, Claro, Oi, Nextel and Algar mobile carriers 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. If you have a 4G ready phone, but you’re **not in a 4G area**, you’ll **still be able to use Voice Calls, Texts and 3G**. The booster is the best suitable for medium size, boost indoor signal areas up to **250 m2**, perfect for home, cafes, restaurants, pubs, clubs and more. The booster enhances cell signals is a low-cost amplifier that wirelessly enhances cell signals for cellular devices (smartphones, tablets, Kindle, etc). It provides stronger signals, longer battery life, and clear connections to your phone. This device will boost mobile providers' 2G and 3G 850MHz, and 2G and 4G LTE 1800MHz (Band 5/3) network signal. This system will provide coverage on both 850MHz, 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! * * * **Clear Voice** No Miss Important Calls **Wow 2G/3G/4G Calls** Eliminates Dropped Calls **Battery Life** Get Longer On Your Phone **Send/Receive SMS** SMS Text Messages Quickly **Consistent Connection** Reliable 3G/4G Data **Seamless Switching** Back to Normal Network **3G/4G Internet** Faster Uploads & Downloads **Multiple Users** 25 Simultaneously **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 \[Voice Calls\] (Band 5, 3) Country Brazil **Boost All On** Vivo (2G & 4G) TIM (4G) Claro (4G) Oi (4G) Nextel (4G) Algar (4G) Sercomtel (3G) Users Supporting 25 Simultaneously Band Dual Band 5 & 3 Frequency 850MHz & 1800MHz Gain(dB) Uplink Gp≥60; Downlink Gp≥65 Up-link 824~849 MHz; 1710~1785 MHz Down-link 869~894 MHz: 1805~1880 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 1 x 5 Meters Indoor Cable **Warming Tips:** - Band Confirmation: This booster can boost signals on Band 5, or 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. ### 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 does a cell phone signal booster do? - A cell phone signal booster helps make your phone calls clearer by making the weak signals stronger. It works like a magic tool that boosts your mobile signal inside your house or in places where the signal is weak. This way, you can enjoy better voice calls and send text messages without any interruptions. 2. How does the 250m2 mobile booster work? - The 250m2 mobile booster works by picking up the weak mobile signals from the outside, amplifying them, and then spreading the stronger signal inside your home. It can boost signals for different mobile networks like Vivo and Sercomtel, helping you stay connected with clear calls and fast texts. 3. Can I use it for different mobile carriers? - Yes! The 250m2 mobile booster supports multiple mobile networks including Vivo, TIM, Claro, Oi, Nextel, and Algar. This means that even if your family members use different phone companies, they can all enjoy improved signals in your home. 4. Is it easy to install the signal booster? - Absolutely! The kit comes with everything you need, including antennas, cables, and instructions for setup. Most people find it easy to install without needing professional help; you just have to follow the simple steps. 5. What if my area doesn't have any mobile signal? - Unfortunately, signal boosters can only make weak signals stronger. If there’s no signal at all outside your house, the booster won’t be able to help. It needs at least a little bit of signal to work. 6. How many people can use the booster at the same time? - The 250m2 mobile booster can support up to 25 users at the same time. This means you and your family or friends can all enjoy better calls and messages together! 7. What frequencies does this booster work on? - This mobile booster works on two main frequencies: 850MHz and 1800MHz. These frequencies are what mobile networks like Vivo and Sercomtel use to provide their services. 8. Will this boost my 4G internet as well? - Yes! The 250m2 booster is great for boosting 4G LTE signals, making your internet faster for browsing or streaming videos. So, not only can you make clearer calls, but you can also enjoy a better internet experience! 9. Can I use my phone in a 4G area without problems? - If your phone supports 4G and you’re in a 4G area, the booster will help you make clearer voice calls using the 4G network. However, if your area doesn’t have 4G, you can still use the booster for voice calls and texts on 3G. 10. What if I want better performance? - If you need better performance indoors, you can upgrade to a higher gain antenna or longer cables in case the standard ones don't reach your desired area. This can help improve the overall signal quality even more! TAGES: cell phone signal booster, Calls and 3G and 4G LTE, Vivo mobile network, Sercomtel mobile network, boost indoor signal, dual band booster, 250m2 coverage, improve voice calls ## Details - **Price:** 295.0 GBP - 415.0 GBP - **Vendor:** UKMobileBooster.com - **Type:** Brazil - **Tags:** application Voice Calls, br br, coverage up to 250 sq metres, frequency 850 1800MHz, provider Sercomtel, provider Vivo ## Variants | Variant | Price | Available | |---------|-------|-----------| | No / No / No | 295.00 GBP | In stock | | No / No / Yes | 315.00 GBP | In stock | | No / Yes / No | 345.00 GBP | In stock | | No / Yes / Yes | 365.00 GBP | In stock | | 20 M / No / No | 315.00 GBP | In stock | | 20 M / No / Yes | 335.00 GBP | In stock | | 20 M / Yes / No | 365.00 GBP | In stock | | 20 M / Yes / Yes | 385.00 GBP | In stock | | 30 M / No / No | 325.00 GBP | In stock | | 30 M / No / Yes | 345.00 GBP | In stock | | 30 M / Yes / No | 375.00 GBP | In stock | | 30 M / Yes / Yes | 395.00 GBP | In stock | | 40 M / No / No | 335.00 GBP | In stock | | 40 M / No / Yes | 355.00 GBP | In stock | | 40 M / Yes / No | 385.00 GBP | In stock | | 40 M / Yes / Yes | 405.00 GBP | In stock | | 50 M / No / No | 345.00 GBP | In stock | | 50 M / No / Yes | 365.00 GBP | In stock | | 50 M / Yes / No | 395.00 GBP | In stock | | 50 M / Yes / Yes | 415.00 GBP | In stock | ## Images - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster - Calls - 250m2 (Vivo/Sercomtel) Cell Phone Signal Booster --- > Source: [B4U](https://www.ukmobilebooster.com/products/br-td250-mobile-booster) > Updated: 2026-09-02