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How TU Go works

TU Go is a free app that lets you use your O2 number on smartphones, tablets and laptops.

It's just like using your phone. Sign in to TU Go using a wifi connection to get your calls, texts and voicemail on up to 10 devices. The person you're talking to doesn't even need to have the app.

Our latest version of TU Go now also lets you use the app over any mobile data (3G / 4G) connection – so you can now use TU Go for calls, texts and voicemails whenever you have mobile data available. If you want to use mobile data for TU Go calls, you can switch this on in Settings.


Calls and texts you make through TU Go cost the same as on your mobile and come out of your monthly allowance.

The app also uses a small amount of data to sync your Timeline and voicemail - make sure you're connected through wifi, so you're not using your mobile data allowance. If you switch on calls over 3G/4G in TU Go Settings, TU Go calls will use up your monthly allowance of mobile data as well as your allowance for calls and texts.

If you've used up your calls, texts or data allowance, you'll be charged at the standard rates.

Getting TU Go

TU Go is available on:

  • iPhone, iPad and iPod Touch (with iOS5.0 or higher)
  • Android phones and tablets (with Android 2.3 and later)
  • Windows phones (with Windows Phone 8.0 or above)
  • PCs (with Windows 7)

Download the app from:

Download the app onto your phone, tablet or PC and register with your Pay Monthly number. It doesn't have to be installed on your phone for you to receive calls.

You can download the app as many times as you like, but you can only be logged in on a maximum of 10 devices at one time.

Create an account

Tap 'Register' to start creating your TU Go account. You'll need to be able to receive a text to sign up, so make sure you've got signal and keep your O2 phone handy.

Signing up for TU Go will make some changes to your O2 account - we ensure voicemail is switched on for your phone number (you can switch this off again from the app). All call forwarding or diverts you had will be turned off while your TU Go account is active. And you'll also see a TU Go Bolt On in My O2.

Managing when TU Go is on or off

TU Go includes a clear on/off switch in the bottom right hand corner of the app. When you want TU Go to be active for all calls and texts just make sure this is switched on (it will go blue to show TU Go is active). Just press it again to switch it off. If TU Go is off and you make a call or send a text from within the app, it will automatically make it active again.


If you're signed in to TU Go on a smartphone, you'll get a text notification from your phone and another one from TU Go. You can change this in the app settings - just switch Text notifications 'off' and you’ll stop getting TU Go notifications for new texts.

Once you've signed up, you'll also get notifications in TU Go for any voicemails that you receive. You can turn voicemail off entirely (for TU Go and your mobile) from TU Go's settings.

Using TU Go abroad

When you're abroad, people can call you via TU Go by dialling your mobile number as usual.

If you call or text on wifi only, it'll cost the same as if you were in the UK, and come out of your monthly allowance. Calls to international numbers will be charged at the usual UK rate.

If you leave your data switched on, TU Go's Timeline and voicemail will keep syncing over the mobile network and you'll have to pay the roaming charges for using data abroad, which can be very high. If you switch on calls over 3G/4G in Settings, making and receiving TU Go calls may also incur roaming charges.

To avoid charges, switch off your data roaming:

  • iPhone users: tap Settings, General, then Mobile Data and slide Data Roaming to off
  • Android users: tap Settings in your apps menu, select Wireless & Networks then Mobile Networks and uncheck the Data Roaming box

Problems logging in
If you've forgotten your password , you can reset it from the TU Go app:

  • From the TU Go home screen, tap Existing user
  • Enter your phone number and tap Forgot Password
  • We'll text a code to your phone
  • Type the code into TU Go, and you'll be able to reset your password

Problems accessing TU Go

Calls made over TU Go require a good wifi connection - TU Go calls may sound distorted if the connection drops in quality. Ensure the hotspot you're using isn't being shared by lots of users or being used for high-bandwidth services.

Your call will drop if you move between different wifi hotspots or you move out of coverage.

We don't recommend using TU Go on open or shared connections that aren't password protected. Try using a secure connection at home or work that's protected with a password.

Using Tu Go for emergencies

If you make a 999 call from the TU Go app on your phone, the app will close and the call will be attempted over our network. If you're using TU Go to make an emergency call on an iPhone, you'll need to press Yes on the popup window that appears.

However, if you're using a tablet or any wifi only device that can't make mobile network calls, you'll be able to use TU Go to make an emergency call if you're connected to wifi.

Other services supported by TU Go

Premium rate numbers and text short codes aren't supported in TU Go. To use these, you'll need to use your phone as normal.

While calls and text messages to sensitive numbers (like support helplines/charities) may not appear on your bill for anonymity reasons, the TU Go Timeline will show a record across all logged in devices. For your privacy, we recommend deleting these records from your TU Go Timeline so they can't be seen by anyone else.

TU Go may work on devices like Bluetooth headsets, through wifi boosters or app simulators for other operating systems, but we're unable to help with issues on devices or operating systems that we don't support.

Removing TU Go

You can clear your TU Go Timeline history by marking all of your timeline conversations and selecting Delete.You can also log out of specific devices by going to TU Go Settings, then Account and Log out.

You can delete the TU Go app from your devices, but if you wish to permanently delete your TU Go account as well, go to Settings, then Account, and Delete Account. This will permanently delete all your data - you won't be able to get your Timeline back if you sign up for TU Go again in the future.

If you're not sure about any techy terms, check out our jargon buster

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