# Calls - 250m2 (AIS) Mobile Signal Booster ##### **Enhanced Signal Reception** Experience boosted calls with the Calls - 250m2 (AIS) Mobile Signal Booster. Designed for optimal performance at 900MHz, this device significantly improves indoor signal coverage up to 250 square meters. Enjoy seamless voice calls and speedy text messaging whether you're at home, in a café, or at work. ##### **Easy Installation** Installing the Calls - 250m2 booster is a breeze! The complete kit includes everything needed—external aerial, cables, indoor antenna, and power adapter—ensuring a simple setup process. Just follow our quick guide for a hassle-free installation and start enjoying crystal-clear connections within moments. ##### **Wide Area Coverage** Cover larger spaces effortlessly! The booster is ideal for medium-sized areas, providing significant signal enhancement over 250m2. Whether it's your home, office, restaurant, or club, this product guarantees wider signal coverage, making it perfect for multiple users and various environments. ##### **Boost Performance with Upgrades** Customize your mobile experience with optional upgrades! Improve performance by selecting a higher gain Yagi antenna or extending your external cable length. These enhancements ensure maximum signal reception and reliability, adapting to the needs of your specific location. ##### **Complete Safety Solutions** Protect your equipment with the lightning surge protector upgrade. Designed to shield against high amperage surges caused by lightning strikes, this essential addition ensures the longevity of your booster and keeps your devices safe from unforeseen electrical damage. ##### **Multiple Simultaneous Users** Stay connected with family and friends! The Calls - 250m2 mobile signal booster supports up to 25 simultaneous users, allowing multiple devices to enjoy superior signal strength and quality. Perfect for shared spaces, this feature makes communication smoother for everyone. It boost **Calls** signal on 900MHz frequency, the frequency used in **Thailand** used by mobile networks to deliver their mobile services: 2G (also known as GSM). It work on 900Mhz (Band 8) frequency for improving AIS mobile carrier networks **Voice Calls & Text** signal. The booster is the best suitable for medium size, boost indoor signal coverage up to **250 m2**, perfect for home, cafes, restaurants, pubs, clubs and more. * * * **Clear Voice** No Miss Important Calls **Send/Receive SMS** SMS Text Messages Quickly **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 & Text\[ (Band 8) Country Thailand **Boost All On** AIS (2G) Users Supporting 25 Simultaneously Band Single Band 8 Frequency 900MHz Gain(dB) Uplink Gp≥50; Downlink Gp≥55 Up-link 890~915 MHz Down-link 935~960 MHz Export Power(Po) ≥10dBm 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, 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 mobile signal booster? - A mobile signal booster is a device that helps improve weak mobile network signals inside buildings. It takes the existing outside signal and makes it stronger, allowing you to enjoy better calls and faster texts. 2. How does the Calls - 250m2 (AIS) Mobile Signal Booster work? - This specific mobile signal booster works on a 900MHz frequency. It enhances voice calls and text message signals for AIS mobile users in Thailand. It can cover an area of up to 250 square meters, making it great for homes, cafes, and small businesses. 3. Where should I install the outdoor antenna? - You should install the outdoor antenna where you get the best mobile signal, usually on the roof or balcony. This helps the booster pick up the strongest outside signal to amplify it indoors. 4. Can I use the booster if I have no signal outside? - No, the booster needs some signal from outside to work. If there is no signal outside, the booster cannot amplify anything, so make sure you have at least a small signal before installation. 5. How many devices can connect to the booster? - The Calls - 250m2 (AIS) Mobile Signal Booster can support up to 25 devices at the same time, like smartphones and tablets, enabling everyone to enjoy better mobile service. 6. Is it easy to install the mobile signal booster? - Yes! The booster comes with all the necessary parts for installation, including antennas and cables. It's recommended to do a loose installation initially, so you can test where the equipment works best before securing everything. 7. What if I need a longer cable for my installation? - If the standard 10-meter cable is not enough for your needs, you can upgrade to longer cables, such as 20, 30, 40, or 50 meters, to ensure your installation is successful. 8. What internet signal bands does the booster support? - This booster specifically supports the AIS 2G network on Band 8, using a frequency of 900MHz to enhance voice calls and texts. 9. Do I need to upgrade the external antenna? - If you are getting weak signals indoors, upgrading to a higher gain antenna can help improve the performance of your booster, especially if your outdoor signal is not strong. 10. What should I do if I have installation questions? - If you have questions about installation, you can check the quick start guide that comes with the booster, or you can reach out to customer support for assistance. TAGES: Mobile Signal Booster, AIS Signal Booster, Thailand Mobile Booster, 250m2 Coverage, Voice Calls, SMS Booster, 900MHz Frequency, Indoor Signal Improvement ## Details - **Price:** 110.0 GBP - 230.0 GBP - **Vendor:** UKMobileBooster.com - **Type:** Thailand - **Tags:** application Voice Calls, coverage up to 250 sq metres, has_stock_countdown, provider AIS, th AIS, th th ## Variants | Variant | Price | Available | |---------|-------|-----------| | No / No / No | 110.00 GBP | In stock | | No / No / Yes | 125.00 GBP | In stock | | No / Yes / No | 160.00 GBP | In stock | | No / Yes / Yes | 180.00 GBP | In stock | | 20 M / No / No | 130.00 GBP | In stock | | 20 M / No / Yes | 150.00 GBP | In stock | | 20 M / Yes / No | 180.00 GBP | In stock | | 20 M / Yes / Yes | 200.00 GBP | In stock | | 30 M / No / No | 140.00 GBP | In stock | | 30 M / No / Yes | 160.00 GBP | In stock | | 30 M / Yes / No | 190.00 GBP | In stock | | 30 M / Yes / Yes | 210.00 GBP | In stock | | 40 M / No / No | 150.00 GBP | In stock | | 40 M / No / Yes | 170.00 GBP | In stock | | 40 M / Yes / No | 200.00 GBP | In stock | | 40 M / Yes / Yes | 220.00 GBP | In stock | | 50 M / No / No | 160.00 GBP | In stock | | 50 M / No / Yes | 180.00 GBP | In stock | | 50 M / Yes / No | 210.00 GBP | In stock | | 50 M / Yes / Yes | 230.00 GBP | In stock | ## Images - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster - Calls - 250m2 (AIS) Mobile Signal Booster --- > Source: [B4U](https://www.ukmobilebooster.com/products/th-g250-mobile-booster) > Updated: 2026-09-02