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Our bestest upgrade deals on O2

If you upgrade to O2 you’ll get some fantastic benefits. These include O2 Priority, which gives you exclusive discounts, prize draws and concert tickets. You can also get free Wi-Fi when you’re on the go with O2 Wi-Fi, and TU Go lets you use your phone when there’s no signal. Awarded No.1 Network for Customer Satisfaction by Ofcom.

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* You will be charged for incoming calls if you're using your Equipment abroad outside of our Europe Zone (including the cost of receiving voicemail messages). If you use Services abroad outside of our Europe Zone, it will usually take longer to be billed. It's best to check the cost of using your Equipment abroad outside of our Europe Zone before you travel. Accidental roaming might occur if you are in an area close to national borders because your Equipment picks up a network across the border. If this happens, you may be charged as though you were roaming on an international network. You can prevent this if you are near a national border by setting your Mobile Phone or other Equipment (as applicable) to do a manual network selection and select the 'O2' Network. Click here to find out where you can roam like home in European destinations. For further T&C's click here.