For O2 Pay Monthly customers travelling from the UK to the USA this winter, you have two primary options for staying connected: using O2's international roaming service or opting for a dedicated travel eSIM data plan. Both approaches allow you to use your smartphone for navigation, social media, and communication, but they differ significantly in cost structure, data allowances, and flexibility. Understanding these differences can help you choose the most suitable and cost-effective option for your trip.
O2 Travel Bolt On for USA Roaming
O2 offers the O2 Travel Bolt On for Pay Monthly customers travelling outside their Europe Zone, which includes the USA. This bolt-on provides a fixed daily charge for usage in eligible destinations. According to O2, the O2 Travel Bolt On costs £7 a day for the days you use it O2 Travel | Stay connected while you’re away | O2. This daily charge covers 24 hours from the first usage and is triggered when you make a call, send a text, or use data. Receiving calls or texts does not trigger the daily charge.
With the O2 Travel Bolt On, you get unlimited minutes, texts, and data in the USA. You can make unlimited calls back to the UK and within the USA. However, calls to other countries are not included and will be charged at standard roaming rates. It's important to note that while data usage is unlimited, data speeds are capped at 2Mbps O2 Travel | Stay connected while you’re away | O2. This speed is generally sufficient for standard definition video streaming on a mobile device. The cost of the O2 Travel Bolt On is not included in your Spend Cap.
To activate the O2 Travel Bolt On, you can sign in to My O2 before you travel or text TRAVEL to 23336 O2 Travel | Stay connected while you’re away | O2. If you do not activate O2 Travel, or if you visit a destination not covered, you will pay standard roaming rates, which can be significantly higher.
Travel eSIM Data Plans for the USA
A travel eSIM offers an alternative to traditional roaming, providing a dedicated data plan for your destination. eSIMs are digital SIMs embedded in your device, eliminating the need for physical SIM cards. One of the key benefits of using an eSIM is enhanced security, as it cannot be physically removed if your iPhone is lost or stolen Apple: travel with eSIM. You can also have two eSIMs active at the same time on supported iPhone models, allowing you to keep your home O2 number active for calls and texts while using a travel eSIM for data Apple: travel with eSIM.
To use a travel eSIM from a different carrier, your iPhone must be unlocked Apple: travel with eSIM. You can check your iPhone's lock status in Settings > General > About, where "No SIM Restrictions" indicates an unlocked device. Travel eSIMs are typically purchased from worldwide service providers, often offering prepaid data-only plans with various data amounts and durations. These plans are usually activated digitally, for example, via a QR code or an app.
When using a travel eSIM, you can choose to use it as your primary data line. If you keep your O2 home line active simultaneously, it will continue to work for calls and texts, but you might still incur roaming fees from O2 if you use it for services other than data (which would be handled by the travel eSIM) Apple: travel with eSIM. For data, you would manually select the travel eSIM as your cellular data line in your iPhone's settings.

Hypothetical Cost Comparison
Let's consider a hypothetical 10-day winter trip to the USA where you use data every day:
- O2 Travel Bolt On: 10 days x £7/day = £70. This provides unlimited data (capped at 2Mbps), unlimited calls to the UK and within the USA, and unlimited texts.
- Travel eSIM: The cost for a travel eSIM will vary significantly based on the data allowance and duration you choose. For example, a 10GB data plan for 30 days might cost around £20-£30, while a 20GB plan could be £30-£40. These are hypothetical prices for illustration and actual prices should be checked with specific providers.
In this hypothetical scenario, if your data needs are moderate, a travel eSIM could potentially offer a lower overall cost for data compared to the O2 Travel Bolt On, especially for longer trips or if you don't need unlimited calls and texts from your UK number while abroad. However, if you require unlimited calls and texts from your O2 number daily, the O2 Travel Bolt On might be more convenient despite the potentially higher daily cost.
Choosing the Right Option for Your Winter Trip
When deciding between O2 Travel and an eSIM for your USA winter trip, consider the following:
- Data Usage: If you anticipate heavy data usage (e.g., streaming high-definition video, frequent video calls), the unlimited data of O2 Travel might seem appealing, but remember the 2Mbps speed cap. A high-data eSIM plan might offer faster speeds, depending on the provider and local network conditions.
- Call and Text Needs: If you need to make frequent calls and send texts using your O2 UK number, especially back to the UK, the O2 Travel Bolt On includes unlimited calls and texts. A data-only eSIM will not provide a local number or SMS capabilities, though you can use VoIP apps (like WhatsApp, FaceTime, or Messenger) over data for communication. Your O2 line can still receive calls and texts, but using it to make calls or send texts (if not covered by O2 Travel) could incur standard roaming charges.
- Device Compatibility: Ensure your phone supports eSIMs. Most iPhone models from XS, XS Max, XR, or later support eSIM Apple: travel with eSIM. Crucially, your phone must be unlocked to use a travel eSIM from a different carrier.
- Flexibility: eSIMs offer flexibility in choosing plans that match your exact data needs and trip duration, often allowing you to purchase and activate a plan before you even leave the UK.

Before your winter departure, carefully review the terms and conditions of the O2 Travel Bolt On O2 Travel | Stay connected while you’re away | O2 and compare them with available eSIM data plans for the United States. Always check the current prices, data allowances, validity periods, and network coverage details of any eSIM package before making a purchase. Remember that successful payment for an eSIM does not automatically mean the profile is installed or active; follow the provider's instructions for installation and activation.
Frequently Asked Questions
What is the daily cost of O2 Travel Bolt On in the USA?
The O2 Travel Bolt On costs £7 a day for Pay Monthly customers when used in the USA. This charge is applied only on days you make a call, send a text, or use data, covering a 24-hour period from first usage.
Does O2 Travel Bolt On offer unlimited data in the USA?
Yes, the O2 Travel Bolt On includes unlimited data in the USA. However, data speeds are capped at 2Mbps, which is suitable for standard definition streaming and general browsing.
Can I use my O2 UK number for calls and texts with a travel eSIM?
Yes, on supported iPhone models, you can have your O2 UK eSIM active for calls and texts while using a separate travel eSIM for data. Your O2 line can receive calls and texts, but making calls or sending texts may incur roaming fees if not covered by an O2 roaming plan.
Do I need an unlocked phone to use a travel eSIM in the USA?
Yes, to use a travel eSIM from a different carrier or worldwide service provider in the USA, your iPhone must be unlocked. You can check your phone's lock status in your device settings.
What are the benefits of using a travel eSIM over O2 roaming?
Travel eSIMs can offer more flexible data plans, potentially lower costs for data-only usage, and often faster data speeds than the 2Mbps cap on O2 Travel. They also provide enhanced security as they cannot be physically removed from your device.




