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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.
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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.
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HD Voice
HD (High Definition) Voice is a free service that gives you crystal clear voice calls. Find out more.
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4G explained
Read about the difference between 4G and 3G, how 4G works, and check for coverage in your area.
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Wifi on the Underground
Connect to wifi when you're on the Tube.
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