Data not working in UK or Italy

[Farida]

Hi,

I bought an O2 SIM with 25GB data, but mobile internet doesn’t work — neither in the UK nor in Italy. Only WhatsApp messages go through.

Can you please check if there’s any issue with my SIM?

[jonsie]

These are some tips to try :

•   Reboot phone.
•   Manually search for a different network
•   If using an iPhone, change data APN to  mobile.o2.co.uk
•   Call customer service to check for any roaming bars
•   Or if you message O2 using the social media links below, they should be able to help you with this
• check APN settings here : O2 UK 5G APN Settings 2025 - 5G 4G APN Settings
• Guide: How to find help & contact O2