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Nextivity Telstra Cel-Fi 3G Smart Repeater & Mobile Booster

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Nextivity Telstra Cel-Fi 3G Smart Repeater & Mobile Booster

Don't suffer from poor indoor mobile coverage and slow mobile internet speeds any longer!


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Compulsory Registration
Before purchasing it is a regulatory requirement that you must complete an application form before the item is shipped. The application can be found here.

Your legally compliant Telstra-approved repeater solution

The Nextivity Telstra Cel-Fi 3G Smart Repeater & Mobile Booster meets ACMA Regulatory requirements and is approved by Telstra for use on its 3G network – other illegal/unauthorised repeaters can attract severe penalties.

Boost indoor mobile coverage and improve 3G data speeds

All you need is somewhere in your home that gets at least 1 bar of Telstra 3G signal to enable the Cel-Fi to provide indoor coverage; simply place the Cel-Fi boxes inside your home and enjoy increased 3G mobile reception. After the easy 5 minute setup, the Cel-Fi Repeater increases your mobile signal, to assist with improving voice quality and 3G data speeds for multiple devices

Eliminate interference between networks to receive optimal signal strength, super-fast download speeds and crystal clear voice quality!

The Cel-Fi 3G Smart Repeater & Booster is superior to standard repeaters due to its unique design which eliminates interference with the mobile network and other users, providing maximum signal strength, reliability, crystal clear voice quality and optimal 3G data speeds.

Extend your mobile phone battery life

Mobile phones use more energy when they are constantly searching for stronger signals – with the Cel-Fi system your indoor mobile signal will be strong and the battery will last noticeably longer so you can talk, check your emails and chat on Facebook for longer.

Antenna for Nextivity Cel-Fi 3G Smart Repeater

Please note:

This model is compatible with the Telstra 3G 850MHz Network only which is supported by Telstra Mobile and all MVNOs which use Telstra’s 3G 850MHz network.

To satisfy regulatory requirements, by purchasing this product, you are agreeing to the below:

  • I have an existing device that connects to the Telstra 850MHz network either directly via Telstra’s mobile network or via an MVNO.
  • To comply with regulatory requirements Cel-Fi repeaters can only be shipped to the address where they will be installed.
  • This product cannot be shipped to PO Boxes.
  • Telstra 3G coverage is available at my location via a handheld or external antenna, according to Telstra’s coverage maps (
  • The area to be covered is no more than the size of a typical suburban residence
  • My 3G device works in other sites/locations
  • The coverage problem has always existed, as far as you know
  • Kogan is required to pass my information to Powertec Telecommunications as part of Australian regulatory requirements. This information may also be shared with Telstra (the supplier of the network) when requested. My information will only be used for regulatory purposes by the aforementioned parties and will not be shared with any other third party for any other purpose.

Frequently Asked Questions

Do I need to have a broadband connection?


What size coverage area can I expect with the Cel-Fi repeater?

Typically a 600 meters-squared indoor coverage area, depending upon the input signal and internal structure of the building.

Does the Cel-Fi support GSM, 3G or 4G?

The Cel-Fi supports 3G only and will not boost a GSM or 4G signal. The Telstra model will only work on Telstra’s 850Mhz NextG network

What frequency does the Cel-Fi support?

There are several different combinations in the WCDMA 850, 900, 1800, 1900, AWS, 2100, 2600 bands the system supports. See the models page for more information. The Telstra model will only work on Telstra’s 850Mhz NextG network.

How many mobile devices can be connected to the Cel-Fi at one time?

The actual number of devices that the Cel-Fi system can support can vary depending on user location, the type of use and signal strength. The Cel-Fi system is expected to support the needs of a small office/family residence.

Does the Cel-Fi system improve mobile voice calls as well and mobile internet?

Yes, live network tests conducted by wireless carriers have shown that our systems can improve data speeds by 200% to 300% (and many times more).

How far apart can the Window Unit (WU) and the Coverage Unit (CU) be placed?

Distances vary depending on the path loss of the walls between the units, but in general an indoor distance of up to 20 meters (66 feet) is common.

This Product is offered and supplied by Kogan Australia Pty Ltd pursuant to the Terms and Conditions.

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