Help and Support

TU Go

We're closing TU Go

TU Go is closing on 30th November 2017. You'll be able to use it up until then but you'll need to make sure you've saved any messages or images that you don't have elsewhere as the app won't work after this date. With O2’s launch of Wifi and 4G Calling on many current and new devices, it now means that you can make and receive calls whenever you are connected to wifi without the use of an additional app.

Wifi Calling

The following phones will allow you to make a wifi call wherever you have a wifi signal, without the need for an additional app:

  • iPhone X, 8, 7, 6S, 6, and SE (including Plus models)
  • Samsung Galaxy S8, S8+, S7, S7 edge and Note 8 *
  • Sony XZ Premium, XZ1 and XZ1 Compact*

*Android devices must be using O2 firmware in order to work with Wifi Calling. You can find out how to get set up and check if your device is compatible at the following links -

Consumer - Find out more about Wifi Calling and how to set it up

Business - Find out more about Wifi Calling and how to set it up

We’re continuing to extend the range of Wifi Calling compatible handsets we offer.

Other ways to make calls over wifi

Don’t have a Wifi Calling compatible device? Not ready to make the change? You could still keep in touch over wifi through some alternative apps. Whether you want to video call family in Australia or send photo messages to your mates, there are apps out there to keep you in touch with the people that matter the most to you. Check out the Apple app store or Google Play store for them.

Going abroad?

If you're travelling in Europe, calls, texts and data are now included at no additional cost in our Europe Zone, allowing you to Roam Like At Home.

Find out more

If you're going further afield, try our O2 Travel bolt-on. Or for Business customers we also offer our single or 30-day Rest of World pass.

Need more help?

Pop into your nearest store or give us a call on 202.

What is Wifi and 4G Calling?

Wifi Calling (also called Voice over Wifi or VoWifi), allows you to make and receive calls even if you can’t connect to the mobile network. When connected to wifi, you can just dial the number you want to call like normal.

4G Calling (also called Voice over LTE or VoLTE) lets you make calls using our fast 4G network, for a clearer voice call. If 4G Calling is available, you can just dial the number you want to call like normal. You can check 4G Calling coverage using our coverage checker.

They're two great ways to stay connected with O2. Wifi Calling can help when you can't get a signal, and both give you great quality calls. In 4G Calling areas, they work together to provide a seamless and uninterrupted experience as you move from one to another, without the call dropping.

What phone do I need?

Wifi and 4G Calling is available on many of our devices. Check if your device is supported

How do I pay for Wifi and 4G Calling?

It’s no different to making a standard call now. It will come out of your call allowance or be charged at the standard tariff rate if you run out.

  • No extra charges from O2 – a minute is just a minute no matter how you make the call.
  • 4G calls will not cost you any data.
  • Wifi calls use very small amounts of data over your wifi connection.
  • If the wifi is unlimited or free (like O2 Wifi) then you won’t be charged anything extra. If your wifi connection has an allowance, then it will come out of that allowance, and your wifi provider may charge if you go over.
  • Multi-Party calls: These are charged as normal but please note that each identical part of a multi-party or conference call will appear on your bill as a separate call entry.
Can I use Wifi and 4G Calling on an O2 sim-only contract?

Yes you can. Wifi and 4G Calling is currently available on many of our devices. Check if your device is supported.
 

  • Transferring your personal tariff to a sim-only contract and want to add Wifi and 4G Calling? Either go to My O2 to add it to your account at no extra charge, or contact us.
     
  • Have an O2 Business sim-only contract and want to add Wifi and 4G Calling? Get in touch with your Account Manager, Digital advisor, Business Partner or Business customer services to add it to your account at no extra charge.
Will my phone automatically use Wifi or 4G Calling?

When you have wifi coverage but can’t connect to the mobile network, your phone will automatically use Wifi Calling.

iPhone
The carrier message at the top of your screen will change to ‘O2 WifiCall’. If you have a strong phone signal, your phone will automatically use 4G Calling and your bearer will show as ‘4G’.

Android
The indicator bar will display a wifi/phone icon. If you're in a 4G Calling area with good coverage, your phone will automatically use 4G Calling and your bearer will show as '4G'.

Calls made over wifi will only drop if you move out of range and 4G Calling isn't activated or available. If you’re in an area where both Wifi and 4G Calling are available, the call will use 4G first.

You can check 4G Calling coverage using our coverage checker.

Where can I use Wifi Calling?

You can use Wifi Calling wherever there is wifi, including wherever O2 Wifi is available. It’s free to connect to O2 Wifi, but remember other wifi providers might charge you to connect, like on certain trains and in some hotels.

Can I use Wifi and 4G Calling to make calls abroad?

You can’t use Wifi and 4G Calling when you’re abroad. Wifi calls won’t work. Mobile calls will use 2G/3G Roaming and you’ll be charged according to your normal tariff.

If you're on a personal tariff, you can use O2 Travel to stay connected when you’re abroad.
If you're on a business tariff, you can use our Rest of the World 24 Hour Pass to stay connected while you’re away.

Can I use Wifi and 4G Calling on an O2 Business tariff?

Yes, but it's not available on the O2 Business Mobex, Best for Business tariffs or Public Service Network tariffs.

Get in touch to find out more. 

Is there anything else I need to know?

You can still use Wifi Calling to make calls to the emergency services. Please note that if you dial 999 using Wifi Calling where there’s no mobile coverage, the operator will need to ask where you’re calling from as wifi calls don’t show location information.

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