Calls - 250m2 (Gtel Gmobile) Mobile Signal Booster
Frequently Bought Together
Enhanced Call Clarity
Experience crystal-clear voice quality without interruption. The 250m2 Mobile Signal Booster elevates your call confidence, ensuring you never miss an important call again. Perfect for home or business use, it guarantees clear communication every time.
Rapid SMS Delivery
Stay connected seamlessly with rapid SMS delivery! This signal booster enhances your text messaging experience, ensuring that your messages are sent and received quickly, reducing the wait time and enhancing your connectivity.
Wide Coverage Area
Cover up to 250 square meters of space with the Calls - 250m2 Mobile Signal Booster. Ideal for medium-sized areas like homes, cafes, or small offices, it ensures consistent and robust signal strength wherever you are.
Complete Installation Kit
Get everything you need in one package! The booster includes an external antenna, cables, indoor antenna, and power adapter, making installation easy and hassle-free so you can enjoy an enhanced signal in no time.
Flexible Installation Options
Choose the best setup for your needs with adjustable cables and antenna placements. The flexible installation process allows you to test and place components for optimal performance, ensuring that your coverage meets your specific requirements.
Upgrade Flexibility
Tailor your signal booster to your needs with upgrade options for longer cables, higher gain antennas, and surge protectors. Customize your device to maximize performance, especially in areas with weaker signals, ensuring your investment is future-proof.
It boost Calls signal on 1800MHz frequency, the frequency used in Vietnam used by mobile networks to deliver their mobile services: 2G (also known as GSM). It work on 1800Mhz (Band 3) frequency for improving Gtel Gmobile mobile carrier networks Voice Calls & Text 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.
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 3) |
Country | Vietnam |
Boost All On | Gtel Gmobile (2G) |
Users Supporting | 25 Simultaneously |
Band | Single Band 3 |
Frequency | 1800MHz |
Gain(dB) | Uplink Gp≥55; Downlink Gp≥60 |
Up-link | 1710~1785 MHz |
Down-link | 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 |
Custom your solution
Expandable coverage by adding indoor antenna if the outside signal is strong.

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 does a mobile signal booster do? - A mobile signal booster helps improve your phone signal. If you're in a place where it's hard to get a call or send a text, this device makes it easier. It catches weak signals from outside and makes them stronger inside your home or business, so you can talk and text without interruptions.
- How do I set up the Calls - 250m2 Booster? - Setting up the Calls - 250m2 Booster is pretty simple! First, place the outdoor antenna where there's good signal, usually on the roof. Then, connect it to the booster with the cable, and attach the indoor antenna. Finally, plug the booster into a power source. You can test where to place it for the best results before making everything permanent.
- How large of an area can the booster cover? - The Calls - 250m2 Booster can enhance your signal in an area of up to 250 square meters. This makes it perfect for homes, cafes, restaurants, or small offices, so everyone can enjoy better phone coverage.
- What if there's no signal outside? - If there’s no phone signal outside, the booster won’t work. It needs some weak signal to boost. If you find the signal is weak, try placing the antenna in a higher spot or a location with fewer obstacles. Otherwise, you may need to find a different solution.
- Is the booster easy to install? - Yes! The booster is designed for easy installation. The kit comes with everything you need, and you can follow the simple instructions. If you’re not comfortable setting it up, you can always ask a friend or family member to help.
- Can I use the booster for more than one phone? - Yes, the Calls - 250m2 Booster can support up to 25 different phones at the same time. So whether it's you, your family, or your friends, everyone can enjoy a stronger signal together!
- What frequency does this booster work on? - The Calls - 250m2 Booster works on the 1800MHz frequency. This frequency is commonly used in Vietnam for mobile services, specifically for voice calls and text messages. It's important to ensure your network uses this frequency for the booster to work effectively.
- What comes in the booster kit? - The booster kit includes everything you need: the main booster unit, an outdoor antenna, an indoor antenna, a power adapter, and a 10-meter outdoor cable. So you have all the parts to set it up and enjoy better signal right away!
- Can I upgrade the antennas or cables? - Yes, you can upgrade the external cable or the outdoor antenna if you need a longer cable or better performance. Upgrading can help improve the signal strength, especially if you have a weak outdoor signal.
- How do I check my mobile frequency band? - To check your mobile frequency band, just call *3001#12345# on your phone and press the call button. Then select 'Serving Cell Info' to find out the frequency band your phone is using. This step helps to ensure that your booster is compatible with your mobile network.
