Do I need an Antenna, or a Booster, or a Modem / Router?

If you are looking to improve your cellular 3G or 4G signal strength for Voice Calls, SMS and Data this can be achieved in two ways:


Connect an external antenna to your 3G or 4G device. Your device MUST have a facility to connect a cable to it.



Our antenna cables are terminated with an SMA plug, so if your device has a different type of connector you will need a cable adapter.


Use a “Booster”, No cable connection required Keep in mind that the ONLY legal boosters able to be used in Australia are the Cel-Fi brand by Nextivity.
Your Cel-Fi Booster is connected via the supplied cable to an external antenna, plugged in to a convenient 240v mains power point / or 12V / 24V DC source. (Please note the Cel-Fi should not be placed in a hot roof space)
The Cel-Fi is then connected to the supplied internal antenna inside your premises which broadcasts the 3G or 4G signal throughout your premises.

This means that any device within range of the internal antenna will see a MUCH stronger signal, very often 5 bars throughout, depending on the size of the building and construction. Your devices, ie. phones, tablets, modems or routers will benefit from this increased signal, no cabling required.


If you are looking to improve your 3G / 4G cellular data connection only:

  • You can use the Booster scenario described above if you have a 3G  /4G cellular modem / router with its own attached, or built in 3G / 4G Cellular antenna.
  • Recommended: Use a 3G / 4G cellular modem / router and attach an externally mounted antenna connected by cable. Please note our antennas come with a cable terminated with an SMA connector. If your device uses a different type of connector you will need an adapter.


Often a dedicated 3G / 4G modem / router with externally mounted antenna(s) will provide better data throughput than the Booster scenario, if provisioned with 2 antenna sockets, and fed with a MIMO antenna. The router will then supply Wi-Fi, or cabled network connection for your data only devices.



Please Note: Purchasing only an external antenna to improve mobile phone signals will NOT improve your reception unless your phone has the capability to accept a cabled connection.

If in doubt, give us a call on 1300 37 87 00 We'll be happy to work out the best and cost effective solution for your needs.

Share this post

← Older Post Newer Post →


  • Hi
    We have just purchesed a property in northern nsw. Cel-fi go does not work at the house but about 600m away we can get a signal on top of a small hill. We would like to look at using a remote powered cel-fi go to pick up the signal and transmitting it down to the house area.
    Can you sugest 1/ an aerial for the booster 2/ brand of cel-fi booster 3/ transmitter to send and recieve the signal approx 600m.
    Much appreciated Rodney

    Rodney Abernethy on
  • Hi Terry, depending on location, donor towers and signal availability the waterproof coverage antenna we would possibly recommend is the Mars Outdoor panel.

    Obviously the location of the donor antenna, size of area to be covered difference from alarm devices needs to be considered. If you give us a call we’re happy to work through this with you.

    BFM on
  • Greg re: your house in Moonta Bay, if the issue is signal, yes a booster will help, but if due to congestion probably not the right solution. We have a very informative article that discusses this…

    Please give us a call I’m sure we can work out the most appropriate solution for you.

    BFM on
  • Hello
    I have a house in Moonta bay in South Australia.
    We have limited 4g not enough to run Netflix etc
    Am I better to get the nbn connected (it’s available)
    Or you a booster or antenna

    Greg Huggett on
  • We have used your products previously inside offices to get reception., we have some farms with very limited reception.
    We use a Bosch 6000 Alarms with a 3G card to give alarms for fault conditions.
    Do you have a Cel-Fi Booster that has a weatherproof output antenna, so we can use the standard alarm panel 3G antenna plus have an area that personnel can access phone reception.

    David Terrey on

Leave a comment