The O2 Travel Bolt On is available with all pay monthly plans for £6 per day. You can get the O2 Travel Bolt On by texting O2TRAVEL to 23336. Alternatively, you can purchase the Bolt On through My O2.
The O2 Travel Inclusive Zone Bolt On is available for free on selected O2 Refresh and selected O2 SIM only contracts.
Both Bolt Ons come with 120 minutes, 120 texts and unlimited data per day. However, they each cover different destinations.