# Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster ##### **Enhanced Call Clarity** Experience crystal-clear voice calls with our advanced mobile signal booster, designed to amplify both 2G and 4G signals across Krymtelecom, Win Mobile, SMARTS, and more. By optimizing 900MHz and 1800MHz frequencies, you can enjoy uninterrupted conversations even in areas with poor reception. ##### **Improved Text Messaging** Never miss a vital message again! With our booster, send and receive SMS text messages quickly and efficiently. Enjoy faster messaging capabilities across multiple networks while staying connected, no matter where you are. ##### **Reliable Data Connection** Stay online with confidence! The dual-band signal booster supports 4G LTE connections, ensuring a consistent and reliable data flow for all your online activities. Whether streaming, gaming, or browsing, enjoy seamless connectivity in any location. ##### **Wider Coverage Area** Cover larger spaces effortlessly! This mobile signal booster enhances reception across an impressive area of up to 250 square meters. Whether at home or in commercial settings like cafes and restaurants, experience strong signals throughout. ##### **Complete Installation Kit** Everything you need is included! The booster kit comes with a comprehensive set of installation tools, including external and internal antennas, cables, and a power adapter, ensuring a hassle-free setup to boost your mobile signal right away. ##### **Upgrade Options Available** Customize your booster experience! We offer upgrade options for external cables, antennas, and lightning surge protection, allowing you to enhance performance and safety according to your specific needs. Ensure optimal signal reception with our tailored solutions. It boost **Calls** signal on 900MHz, 1800MHz frequencies, the frequencies used in **Russian Federation** used by mobile networks to deliver their mobile services: 2G (also known as GSM) and 4G. It work on both 900Mhz (Band 8) & 1800Mhz (Band 3) frequencies for improving Krymtelecom, Win Mobile, SMARTS, Motiv, Sotovaja and Tattelecom mobile carrier networks **Voice Calls and Text** signal. It also can boost 1800Mhz (Band 3) frequency networks for improving Motiv, Sotovaja and Tattelecom mobile carriers **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 2G**. 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. This system is compatible with all GSM mobile phone networks, will provide coverage on both 900MHz, 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/4G Calls** Eliminates Dropped Calls **Send/Receive SMS** SMS Text Messages Quickly **Consistent Connection** Reliable 4G/LTE Data **Signal Wider Coverage** Reception Up to 250 sq.m. **4G/LTE Internet** Faster Uploads & Downloads * * * ### 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 8, 3) Country Russian Federation **Boost All On** Krymtelecom (2G) Win Mobile (2G) SMARTS (2G) Motiv (4G & 2G) Sotovaja (4G & 2G) Tattelecom (4G & 2G) Users Supporting 25 Simultaneously Band Dual Band 8 & 3 Frequency 900 & 1800MHz Gain(dB) Uplink Gp≥50; Downlink Gp≥55 Up-link 890~915 MHz; 1710~1785 MHz Down-link 935~960 MHz; 1805~1880 MHz Export Power(Po) \-70~-40 dBm/FA(1.23MHz) 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 8, 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 is the Calls - 250m2 Mobile Signal Booster? - The Calls - 250m2 Mobile Signal Booster is a device designed to improve mobile phone signals in your home or other medium-sized spaces. It enhances the 2G and 4G signals on the 900MHz and 1800MHz frequencies, which are commonly used by mobile networks in the Russian Federation like Krymtelecom, Win Mobile, and SMARTS. This means clearer calls and faster data for everyone in that area. 2. How does it help with calls and texts? - This signal booster makes your calls clearer and helps you send and receive text messages quickly. If you're in an area with weak mobile signals, this booster strengthens those signals so you won't miss important calls or messages. Think of it as a megaphone for your mobile phone's connection! 3. Can it improve 4G signals too? - Yes, it can! The booster works not only for 2G calls but also improves the 4G LTE signals for some carriers. If you have a 4G-enabled phone and are in an area with 4G service, this booster can help you enjoy faster internet and clearer voice calls. 4. What if there is no signal outside? - The booster only amplifies existing signals, which means it can't create new signals. If you have no mobile signal outside, the booster won't work for you. It relies on having some-level signal from the outside to enhance it indoors. 5. How do I know if my phone will work with this booster? - To check if your phone works with this booster, you can look for the frequency bands it supports, specifically Band 8 (900MHz) and Band 3 (1800MHz). You can find this by dialing \*3001#12345# on iPhones to check the serving cell info or use apps like 'CellMapper'. 6. Is it easy to install? - Yes! The booster kit comes with everything you need, including the antennas and cables. It also includes instructions for set-up, making it easy for anyone to install and start using. You shouldn’t need professional help unless you want it. 7. How much area can the booster cover? - The Calls - 250m2 Mobile Signal Booster can enhance signal coverage up to 250 square meters. It's perfect for homes, cafes, and small restaurants where many people might be using their phones. 8. What happens if I need extra reach? - If the included 10-meter external cable isn't enough to reach the best signal, you can upgrade to longer cables. This helps ensure that you can set up the booster effectively no matter where the best signal is located. 9. What should I do if my phone shows weak signal? - If your phone shows one or two signal bars indoors, upgrading to a higher gain antenna might help. This can improve your signal strength significantly, especially if the outside signal isn’t very strong. 10. Does it protect my equipment? - Yes, there is an upgrade option for a Lightning Surge Protector which can protect the booster from electrical surges due to lightning strikes. This helps keep your equipment safe in severe weather conditions. TAGES: mobile signal booster, 4G LTE signal, Krymtelecom, Win Mobile, SMARTS, dual band booster, improve voice calls, Russian Federation ## Details - **Price:** 235.0 GBP - 355.0 GBP - **Vendor:** UKMobileBooster.com - **Type:** Russian Federation - **Tags:** application Voice Calls, coverage up to 250 sq metres, has_stock_countdown, provider Krymtelecom, provider Motiv, provider SMARTS, provider Sotovaja, provider Tattelecom, provider Win Mobile, ru ru ## Variants | Variant | Price | Available | |---------|-------|-----------| | No / No / No | 235.00 GBP | In stock | | No / No / Yes | 255.00 GBP | In stock | | No / Yes / No | 285.00 GBP | In stock | | No / Yes / Yes | 305.00 GBP | In stock | | 20 M / No / No | 255.00 GBP | In stock | | 20 M / No / Yes | 275.00 GBP | In stock | | 20 M / Yes / No | 305.00 GBP | In stock | | 20 M / Yes / Yes | 325.00 GBP | In stock | | 30 M / No / No | 265.00 GBP | In stock | | 30 M / No / Yes | 285.00 GBP | In stock | | 30 M / Yes / No | 315.00 GBP | In stock | | 30 M / Yes / Yes | 335.00 GBP | In stock | | 40 M / No / No | 275.00 GBP | In stock | | 40 M / No / Yes | 295.00 GBP | In stock | | 40 M / Yes / No | 325.00 GBP | In stock | | 40 M / Yes / Yes | 345.00 GBP | In stock | | 50 M / No / No | 285.00 GBP | In stock | | 50 M / No / Yes | 305.00 GBP | In stock | | 50 M / Yes / No | 335.00 GBP | In stock | | 50 M / Yes / Yes | 355.00 GBP | In stock | ## Images - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster - Calls - 250m2 (Krymtelecom/Win Mobile/SMARTS) Mobile Signal Booster --- > Source: [B4U](https://www.ukmobilebooster.com/products/ru-gd250-mobile-booster) > Updated: 2026-09-02