A mobile phone antenna booster works only when it is part of a complete system: an outdoor antenna, an amplifier and an indoor antenna that re-broadcasts the signal to your phone. Stick-on antenna patches and unconnected window antennas do not improve reception, because phones have no socket to connect an external antenna to.

Here is what each type of antenna product can and cannot do, so you spend money on the one that fixes your problem.

Why don’t stick-on antenna boosters work?

Stick-on antenna stickers are sold to go behind a phone case or on the battery. They are passive pieces of metal foil with no power and no connection to the phone’s radio. Your phone already has several internal antennas tuned to the 4G and 5G bands it uses, and a sticker cannot add gain or reach a tower further away. There is no good evidence that they add any measurable gain, which matches what most buyers notice.

If you have bought one and seen no change, it is not your phone. It is the product.

When does an external antenna help on its own?

An external antenna works on its own only when it plugs into a device with an antenna port. Many 4G and 5G modems, home internet hubs and some in-car phone cradles and vehicle kits have SMA or TS9 connectors. Connecting a directional antenna to a modem like that can make a big difference to home internet in regional areas.

A handset is different. Phones no longer have antenna ports, so there is no direct way to connect a roof antenna to your phone. To improve calls and data on the phone itself, you need a booster that brings the outside signal indoors. Our article on the purpose of a mobile phone antenna explains the basics.

How does a full booster kit use the antenna?

A mobile signal booster kit has three parts:

  • An outdoor antenna, mounted on the roof, a gutter bracket or a pole, where the signal is strongest.
  • An amplifier inside the building that boosts the signal coming down the cable.
  • An indoor antenna that spreads the boosted signal through the rooms that need it.

It works in both directions, so your phone’s signal is carried back to the tower too. Every phone in range on a network the kit covers gets the benefit, with no setup on the phone. See how it works for a diagram.

Which outdoor antenna should you use in Australia?

  • An omni-directional antenna picks up signal from every direction. It suits suburban homes with a fair signal outside and towers in more than one direction, and it does not need aiming. See the omni antenna.
  • A directional or Yagi antenna focuses on a single tower and reaches much further. It suits farms, acreage, regional towns and homes behind a hill, where the tower may be many kilometres away. See the Yagi antenna.

Most of our kits include an outdoor antenna, so you only need a separate one if you are upgrading for a distant tower or covering a second building. For the indoor side, our guide to choosing an indoor antenna compares ceiling and panel options.

Do you need signal outside before you buy?

Yes. Any antenna or booster can only work with a signal that already reaches your property. Check your phone on the roof line, at the highest point of the block or near the front gate. One or two steady bars outside, or calls that work in the yard but drop indoors, mean a booster is very likely to help. If there is no signal anywhere outside, a booster cannot create one; in that case Wi-Fi calling or a satellite messaging feature on your phone is the better route.

For regional properties, our guide to improving signal in regional areas covers antenna height and aiming.

What results can you realistically expect?

With a usable signal outside and a correctly sized kit, most homes go from dropped calls and slow data indoors to steady calls and reliable 4G or 5G in the rooms covered by the indoor antenna. The improvement depends on the strength of the outside signal, the cable length and how far the indoor antenna is from where you use your phone. A booster will not make the signal stronger than the signal your outdoor antenna receives, so placing that antenna well is the most important step.

If the outside signal is very weak, a directional antenna pointed at the tower usually gives a better result than an omni antenna.

Which kit fits your home and network?

Match the kit to your network and floor area. If everyone uses the same network, see the kits for Telstra, Optus or Vodafone. If people use different networks, a universal kit such as the Home Elite Universal 4G/5G Signal Booster covers them together.

Most kits are built for DIY fitting; our installation guide covers mounting and cable runs. Delivery is free in 5 to 7 working days, and you can return a kit within 30 days.

Frequently asked questions

Can I connect a roof antenna directly to my phone?

No. Phones have no antenna port. A booster kit re-broadcasts the signal indoors instead.

Do phone antenna stickers improve signal?

There is no good evidence that they do. A sticker has no power and cannot add gain.

Is a Yagi antenna better for rural Australia?

Usually, yes. It focuses on one distant tower and reaches further than an omni antenna.

Will an antenna help my 4G modem?

Yes, if the modem has an antenna port. A directional antenna can greatly improve home internet in weak areas.

Not sure which antenna and kit suit your property? Send us your address and network and we will recommend a setup. How to choose the right booster