Frequently Asked Questions

Cel-Fi is Nextivity’s brand of self-configuring, environmentally aware, indoor coverage solutions. Each Cel-Fi system consists of two units. The Network Unit is placed in the area where the strongest native signal can be received from the carrier network (signal levels as low as -120 dBm are acceptable).

The Network Unit comprises a transmitter and receiver which communicates with the cell tower. The Coverage Unit is placed in the center of the home, communicates wirelessly with the Network Unit and “lights up” the interior of the house with significantly enhanced signal levels, thus enabling better quality calls and greater data throughput.

Using mobile phones in weak signal is more dangerous because the phone will blast maximum power to reach the cell site. In weak signal your phone will become hot and battery will drain quickly and the worst part is we position the phone at our ear.

So the fact is with booster installation, signal will improve hence reducing radiation from the phone since it does not have to blast maximum power. It is more harmful to use mobile phone without booster installation.

Cel-Fi is a smart signal booster. That means it relies on intelligent, self-organizing algorithms to ensure you benefit from the largest area of coverage without compromising or interfering with your mobile operator’s networks or impeding other subscribers’ signals. Cel-Fi does not require any new equipment, any configuring, or any changes to existing network infrastructure or mobile devices. It is also a plug and play device, which means that there is no need for professional installation, no drilling, and no cables.

Cel-Fi has been recognized for its superior design and effectiveness and is the only consumer booster authorized for use by the communications commissions in Australia and the United Kingdom, and the only Smart Booster designed to meet the new FCC Safe Harbor 2 specifications that allow very high gain (very high signal gain is necessary to make low level signals useful in a large coverage area).

No. The Cel-Fi system only needs to have at least 1 bar of native cellular signal, in at least one spot of your home to be able to cover your whole home or office space.

Yes, Cel-Fi smart signal boosters can support both voice and data simultaneously.

The radius (half the width) of the coverage bubble is approximately the distance between the Coverage Unit and Network (window) Unit. Here are some general guidelines:

+ Radius = 20 meters (66 ft.) for wood framed walls
+ Radius is less for concrete interior walls
+ Radius can easily exceed 65 meters (200 ft.) for open commercial space

Yes, Cel-Fi smart signal boosters are certified by Malaysian Communications And Multimedia Commission (MCMC) and approved by SIRIM as well as mobile operators.

Cel-Fi signal boosters are Operator specific, and will only boost one Operator’s channels at a time. Being Operator specific is one of the main reasons that we are network safe and can provide 100 dB of signal gain, and why we are the only signal booster approved by a growing number of Operators.

Yes, and for a good reason! Cel-Fi is controlled by and operates as an extension of an operator’s network. This is what allows Cel-Fi (by regulatory authority) to boost signals about 1000x more than other solutions, and therefore cover very large areas even if the original network signal is weak. And it works very well.
Broad-spectrum repeaters can cause interference and damage to networks, so operators have adopted a strict policy against the use of these legacy signal boosters on their own networks. However, Cel-Fi (the only smart signal booster of its kind), is authorized for use by each carrier and allowed to transmit on their licensed spectrum without ruining things for anyone else.

There could be several reasons for this: First you can try rebooting your phone near the Coverage Unit so it takes a fresh look at the available channels. Also verify that your phone is compatible with the channels that your Cel-Fi model is boosting (maybe your handset is “unlocked” and actually does not fully support all your current Operator’s channels). iPhones can also show fewer “bars” of signal if the network is heavily loaded (contact us for more details).

If you would like the benefits of LTE service as well, you can always upgrade your Cel-Fi to a newer version that also supports LTE.