Calls - 250m2 (Telkomsel/Indosat/XL Axiata) Mobile Signal Booster
Enhanced Mobile Coverage
Transform your connectivity experience with the Calls - 250m2 Mobile Signal Booster, designed to amplify signals on the 900MHz frequency used by Telkomsel, Indosat, and XL Axiata networks. Perfect for medium-sized spaces up to 250 m², enjoy clear voice calls and fast text message delivery in homes, cafes, and offices.
Easy Installation
Get up and running quickly with our user-friendly installation kit. The package includes all necessary components: an outdoor antenna, booster unit, indoor antenna, and cables. Simply follow our easy step-by-step guide to improve your signal without the hassle.
Support for Multiple Users
This mobile signal booster can support up to 25 users simultaneously, ensuring that everyone in your space can enjoy uninterrupted communication. Perfect for busy environments such as restaurants, pubs, and clubs.
Reliable Performance
With a downlink gain of up to 55 dB, this booster guarantees a significant improvement in signal strength. Whether you're making important calls or sending quick texts, count on excellent performance even from modest outdoor signals.
Upgrade Options Available
Tailor your booster to your needs with optional enhancements. Choose from upgraded external cables for extended reach and high-gain Yagi antennas for improved reception in low signal areas. Enhance your setup for even better results!
Lightning Surge Protection
Protect your investment with our optional lightning surge protector. Designed to shield your equipment from electrical surges caused by lightning strikes, this add-on ensures your system remains safe and functional.
It boost Calls signal on 900MHz frequency, the frequency used in Indonesia used by mobile networks to deliver their mobile services: 2G (also known as GSM). It work on 900Mhz (Band 8) frequency for improving Telkomsel, Indosat and XL Axiata 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.
No Miss Important Calls
SMS Text Messages Quickly
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.
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

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.
Specification
Application & Bands | Voice Calls & Text (Band 8) |
Country | Indonesia |
Boost All On | Telkomsel (2G) Indosat (2G) XL Axiata (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 |
Expandable coverage by adding a second indoor antenna if the outside signal is strong.

2 Indoor Antennas

3 Indoor Antennas

4 Indoor Antennas

10 Indoor Antennas
Custom your solution:
2 Way Splitter | 3 Way Splitter | 4 Way Splitter | Indoor Cable | Indoor Antenna
How It Works

1
The powerful antenna reaches out to access a voice and 3G, 4G, and LTE data signal, and delivers it to the booster
2
The booster receives the signal, amplifies it, and serves as a relay between your phone and the nearest cell tower.
3
Your devices get increased cell reception, and calls and data are fed through the booster back to the network.
Get stronger signal

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.
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
- Connect the indoor antenna to the MS port.
- Connect the outdoor antenna to the BS Port.
- Install the outdoor antenna and keep a minimum vertical distance of 10 meters from the indoor antenna.
- Point the outdoor antenna to the direction where you know there is possibly a higher signal strength from the base station.
- Power on the booster and check the signal strength.
- 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.

Application Scenarios

Home

Office

Garage

Metal Buildings
- What is a Mobile Signal Booster? - A mobile signal booster helps improve your phone's signal strength. Think of it like a megaphone for your phone's connection. If you're in an area where the signal is weak, this device can make your calls clearer and help you send texts more easily.
- How does the Calls - 250m2 Booster work? - The Calls - 250m2 mobile signal booster works by capturing weak outside signals and amplifying them inside your home or business. This booster uses a frequency of 900MHz, helping to improve calls and texts from networks like Telkomsel, Indosat, and XL Axiata.
- How much area does the booster cover? - This booster can cover up to 250 square meters, which is great for medium-sized homes, cafes, or restaurants. If you're in a small office or living space, it should work perfectly for your needs.
- Can this booster improve my internet speed? - No, the Calls - 250m2 signal booster is designed specifically for voice calls and text messages. It won't improve your internet speed or provide any data services.
- What do I need to install the booster? - You will receive everything needed for installation in one package: an external antenna, an internal antenna, cables, and the main booster unit. All the equipment and instructions will be included to help you set it up easily.
- Can I use this device if I have no signal outside? - Unfortunately, if there's no signal outside, the booster won't be able to help you. The booster amplifies existing signals, but it cannot create a signal by itself.
- Is installation complicated? - Not at all! The installation is user-friendly and straightforward. Just follow the included instructions, and you can set it up yourself without needing professional help.
- What if my phone has a low signal? - If your phone shows 1 or 2 bars of signal, the booster can still help. However, for the best results, it’s recommended to place the external antenna where the signal is strongest outside.
- Can multiple people use the booster at the same time? - Yes! The Calls - 250m2 mobile signal booster can support up to 25 users at the same time, so family members or customers at your cafe can all enjoy better call quality.
- What should I do if I have any problems with the booster? - If you face any issues with the booster, you can always reach out to customer support through the website. They are ready to help you troubleshoot and find solutions to any problems.
