Installing GO in a Car


This article explains how to install Cel-Fi GO in a car, different setups and what performance you can expect.

The Setup
The recommended setup is a donor antenna on the roof of the vehicle, the Cel-Fi GO mounted under the seat and the service antenna on the dashboard facing the passengers.


How to Maximise the Setup:

  • isolating the donor and service antenna from each other as much as possible is the most important key to a good setup. This could be by using the metal roof as a barrier between the antennas, maximising the distance between and positioning the antennas at different levels. The separation is represented by the ‘BOOST’ number found in the WAVE App, with 7 to 9  being optimal in a car. Positioning the indoor and outdoor antennas in different positions will help achieve this.


  • having the donor antenna as high as possible on the outside of the car
  • Tinted windows can also assist with isolating the antennas
  • The greater the isolation between antennas, the higher the boosted signal will be within different areas of the car.
  • It is important to remember that each installation will be different, and it’s not a case of one indoor or outdoor antenna position suits all vehicles.


Outdoor Antenna Setup

The position of the outdoor antenna ideally needs to be high up on the car, so signal can be received in a 360 degree radius and not obstructed by parts of the car.

GO will offer the best performance when the outdoor antenna is isolated as much as possible from the indoor antenna. This is by distance and having a metal panel in between.

From our testing the roof seems to be the optimal position to assist with isolation and height.

Example mounting positions:

Cel-Fi GO Booster for Car


Running the Cable


To get the cable into the car interior, find a gap between the doors or boot and the car body. Ensure the gap is large enough not to squash the cable and you can freely wiggle the cable when the door is shut. The rubber door seals can be pulled out and the cable placed under the rubber.

The interior plastics or carpet can be then used to hide the cable, until you reach under the seat or centre console where the GO is mounted.

It is important not the run the cable in front of any airbags or airbag panels. Also not in areas where the cable could be crushed or punctured by moving doors or seats.

If you have to drill any holes or puncture the door rubbers, be sure that you use sealant to ensure it will not result in water entering the cabin.


Mounting the GO


The most common place to mount the GO is either under a seat or under the centre console. The mounting spot should ideally have some airflow, be safe from bumps and within range of a 12v power source.

Screws are included with the GO, but the easiest way to mount is with industrial adhesive Velcro.

If you do not plan on using the WAVE App with GO, then you will need to maintain access to the band selection button on the front of the casing. Alternately those techy people will be happy to use the App to switch between bands and can hide the GO away.

Remember not to permanently mount GO until you find the optimal antenna positions.


Connecting to Power


GO comes with a 12v power lead with a cigarette lighter socket fitted, this is the easiest way to mount GO. If you want the power hidden away, then a licensed auto electrician can hard wire to your vehicles 12V system.

Some vehicles include a hidden cigarette lighter socket, such as in the centre console box where you can drill a hole through the bottom to run the power cable for a cleaner install.


Mounting the Indoor Antenna


The small panel antenna will radiate the mobile signal out in a bubble pattern, so ideally needs to point towards the passengers. It has an adhesive backing for attaching to a flat surface.

Secondly the signal output of the indoor antenna needs to be isolated as much as possible from the external antenna.

Common places to mount the antenna include the dashboard, front windscreen pillars, sun visors, rear vision mirror or centre console.


TESTING – Outdoor Antenna Positions

Now we come to the fun bit, lets see how different outdoor antenna positions affect the GO’s performance.

With the indoor antenna mounted on the dashboard pointing towards the passengers, we secured a phone to the drivers headrest and obtained signal strength readings from the phone.

The WAVE App provided the Boost and the input signal measurement from the external antenna.

MObile Phone Booster


TESTING – Indoor Antenna Positions

In this test we have the external antenna in the centre of the roof and move around the internal antenna to see how this affects performance to a phone attached to the drivers headrest.

Signal RSSI was measured from the phone, with the GO turned off the signal in the cabin was -100dB.

Input signal from the external antenna was -81dB measured in the WAVE App.



TESTING – Distance from Antenna Test

Want to know what the signal strength is like the further you move away from the indoor antenna, see below for the results during our test.


From our testing the GO performs well, taking the signal from extremely poor where a call would break up, to good where the call was clear.

The main two factors that determined how good the phone signal will be on your phone, is the Boost applied by the GO and the input signal level from the external antenna. This Boost was archeived by isolating the indoor antenna from the outdoor antenna. The Boost measurement can be obtained in the WAVE App with 6 and over being optimal.

Maximising the input signal was achieved by the height of the antenna on the vehicle. In remote areas the gain of the antenna is also going to come into consideration.

The big thing we learnt from our testing is that optimal antenna positions for different vehicles is going to be different. It is important to test the input signal and the boost in the WAVE App before permanently mounting the antennas.


19 thoughts on “Installing GO in a Car

  1. Powertec Telecommunications says:

    I am in far western NSW where I battle to get service with a 6s phone in a bury car kit with a external aerial, I get service in about 50% of the property, will your mobile kit improve my reception, I am very keen.

  2. Powertec Telecommunications says:

    Brian, The amplification of a correctly installed GO is massive. It is some hundreds of times increase in power, so yes you will see a huge increase in performance, black spots will be dramatically reduced and the results are guaranteed or you can get your money back,

  3. Powertec Telecommunications says:

    I have a VWT5 Transoprter camper conversion with a fibreglass popup roof.
    I suspect the roof will not separate the antennas electromagnetically well enough to get the best boost. Am I correct in this assumption? If not where would you mount the antennas?

  4. Powertec Telecommunications says:

    Yes you are correct, fibreglass offers little separation between the indoor and outdoor antennas. The biggest aids in isolation when you don’t have metal in between is:

    – height (horizontal separation between antennas)
    – using directional antennas (pointed in opposite directions)
    – different antenna polarisation for the indoor and outdoor antennas

    So have a vertically polarised Yagi antenna high up on a pole pointing in one direction towards a tower, then the indoor antenna below pointed in the opposite direction that is horizontally polarised. We have telescopic poles that go up to 5.8m and mounts available to assist with this. I hope that helps. Contact us on [email protected] for more information.

  5. Powertec Telecommunications says:

    I’m a 4WD’er who regularly ventures into areas with poor mobile phone reception.

    With the Cel-Fi GO Repeater for Telstra – Trucker/4WD packs, they all quote a “maximum system gain” of 70 dB. So how do I choose between the three antenna options (Mini, Compact & Edge) ?

    Also, do any of the antenna options allow for the antenna to be removed from its base?


  6. Powertec Telecommunications says:

    Hi Doug – The EDGE Compact and EDGE have unscrewable whips that can be taken off the base. Basically the higher the antenna gain for further the antenna can reach for signal, but the narrower the beamwidth (angles the antenna can pick up signal). Picture a balloon that represents the antenna signal pattern, the more your squash it the longer it gets, but the height decreases as a result.. The Mini – Ideal for roof mount – low gain – good in city and mountainous areas. Edge Compact – ideal for bull bar mount – medium gain – ideal for city, mountainous and inland country areas (an all-rounder). Edge Compact – ideal for bull bar mount – high gain – country and desert areas (great in flat terrain). Hope that helps. Regards Cel-Fi.

  7. Powertec Telecommunications says:

    I’m in northern NSW travelling west frequently. am I better to have a high gain antenna mounted on the bullbar or mounted to the top of the trays headboard for best coverage?

  8. Powertec Telecommunications says:

    Hi Casey – Isolating the indoor and outdoor antenna is key to the best boost. We have found that the tray headboard is best, as long as you do not have a rear window on the cab (antennas can generally see each other). If you do then the bull bar option is better with the indoor antenna down low on the dash.

  9. Powertec Telecommunications says:

    is the internal paddle pop antenna directional? In which direction does it favour? thanks.

  10. Powertec Telecommunications says:

    Hi Anthony. It is omni-directional. Your main priority would be to make sure the antennas don’t interfere with each other or you will not be able to optimise the result. Let us know how you go.

  11. Powertec Telecommunications says:

    hi , were would be the best place to mount the internal antenna in a landcruser

  12. Powertec Telecommunications says:

    Hi Michael, Every vehicle will have a slightly different interior layout. Because of this, we usually recommend that users move their internal antenna around the vehicle before mounting it permanently.
    If you do this with your external antenna and Cel-Fi switched on you will be able to determine which mounting position will offer the best cellular coverage throughout your cabin. Commonly used mounting spots include on or underneath the dashboard facing the passengers, on the drivers-side A-pillar facing inward or on the center-console facing upward. Don’t hesitate to get in touch with any further questions.

  13. Powertec Telecommunications says:

    I have one setup in my truck, have got the mini arial on roof with no interference. But doesn’t seem to work much better than what Buri car cradle does.

  14. Powertec Telecommunications says:

    Hi Matt, It sounds like the performance of your Cel-Fi unit is being compromised in some way. You should initially go back to your installer for them to review. Alternatively, please open up a support ticket through the following link and our team can investigate why this is the case:

  15. Powertec Telecommunications says:

    What is the current draw of a cell fi go?
    Does it need to be on a switched power source that turns off with the ignition?

  16. Powertec Telecommunications says:

    Hi Richard,

    Thank you for contacting Powertec.
    Max current draw is 1.5 amp. Usually it draws 0.3-0.7 amps.
    It is good to use a switched power supply so that the Cel-fi does not flat the engine start up battery.

  17. Powertec Telecommunications says:

    Hello Tanya

    Anyone that is with the selected Carrier of the unit you purchased can connect to the Cel-Fi. This product can connect up too 30 people at one time. It is an automatic connection for boosting your signal.
    The Cel-Fi isn’t locked with a password to connect like some Wi-Fi units.

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