Calling, texting and data usage abroad
We can help you with using your phone abroad. Read about O2 Travel and our range of international Bolt Ons.
Self help guide for network problems
Find out how to check for network issues, report faults in your area, and try to fix a signal problem yourself.
HD (High Definition) Voice is a free service that gives you crystal clear voice calls. Find out more.
Read about the difference between 4G and 3G, how 4G works, and check for coverage in your area.
Wifi on the Underground
Connect to wifi when you're on the Tube.
Topics from O2 Community
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