O2 Bolt-Ons, Top-Ups & Pricing

Optional add-ons to manage your usage and reduce out-of-bundle spend

O2 Network
Roaming Checker Bolt-Ons & Rates
Add extra data to your monthly allowance. Top-ups apply to your UK data and can also be used while roaming in Europe.
Data Top Up 5GB
Extra UK data if you exceed your plan allowance.
5GB data
£5.50ex VAT / month
Data Top Up 10GB
Extra UK data for higher monthly usage.
10GB data
£8.00ex VAT / month
Data Top Up 20GB
Best value top-up for heavy data users.
20GB data
£13.50ex VAT / month
Data Top Up 5GB
Extra UK data if you exceed your plan allowance.
5GB data
£6.50ex VAT / month
Data Top Up 10GB
Extra UK data for higher monthly usage.
10GB data
£9.00ex VAT / month
Data Top Up 20GB
Best value top-up for heavy data users.
20GB data
£15.00ex VAT / month
Reduce the cost of calling and texting international numbers from the UK. Choose a pack based on your destination and volume.
International Caller Add-On
Reduced international calling rates from the UK (destination-based).
Reduced rates
£3.50ex VAT / month
Int. Minutes Europe 500
Calls from the UK to European destinations.
500 minutes
£5.50ex VAT / month
Int. Minutes Europe 1000
Higher-volume calling to Europe from the UK.
1,000 minutes
£10.00ex VAT / month
Int. Minutes Worldwide 500
Calls from the UK to worldwide destinations.
500 minutes
£30.00ex VAT / month
Int. Minutes Worldwide 1000
Higher-volume worldwide calling from the UK.
1,000 minutes
£48.00ex VAT / month
International SMS 250
Texts from the UK to international destinations.
250 SMS
£6.00ex VAT / month
International SMS 500
Higher-volume international texting from the UK.
500 SMS
£12.00ex VAT / month
International Saver 100
Budget pack for calling key international destinations from the UK.
100 minutes
£3.50ex VAT / month
International Saver 500
Higher-volume calling to popular international destinations.
500 minutes
£7.00ex VAT / month
International World 100
Calls from the UK to worldwide destinations.
100 minutes
£22.00ex VAT / month
International World 500
Higher-volume worldwide calling from the UK.
500 minutes
£70.00ex VAT / month
International World 1000
Maximum worldwide calling package from the UK.
1,000 minutes
£140.00ex VAT / month
International SMS 100
Texts from the UK to international destinations.
100 SMS
£3.50ex VAT / month
Roaming packs for calls and data when travelling outside of Europe. These apply alongside the daily worldwide roaming charge and give you a larger allowance for heavy roaming use.
Roaming Minutes & Data 250
Short trips outside Europe — light usage.
250 mins + 250MB
£60.00ex VAT / month
Roaming Minutes & Data 500
Trips outside Europe — moderate usage.
500 mins + 500MB
£90.00ex VAT / month
Roaming Minutes & Data 1000
Trips outside Europe — heavier usage.
1,000 mins + 1GB
£120.00ex VAT / month
Roaming data packs for use when travelling outside Europe. These provide data allowance on top of the daily worldwide roaming charge.
Roaming Worldwide 250MB
Light data usage on short trips outside Europe.
250MB data
£42.00ex VAT / month
Roaming Worldwide 500MB
Moderate data usage on trips outside Europe.
500MB data
£78.00ex VAT / month
Roaming Worldwide 1GB
Heavier data usage on trips outside Europe.
1GB data
£140.00ex VAT / month
Specialist bolt-ons for non-geographic calls, Ireland calling, and bundled options.
Non-Geographic Minutes 300
Frequent calls to 084/087 service numbers.
300 minutes
£3.50ex VAT / month
Ireland Plus
Use your UK allowance to call and text the Republic of Ireland.
ROI calls & texts
£3.50ex VAT / month
No additional specialist bolt-ons are currently available for Vodafone. Contact us if you need a bespoke solution.
These charges apply when you use services not included in your plan allowance, or when you exceed your allowance. Adding a bolt-on can significantly reduce these costs. All prices exclude VAT. Rates apply to both O2 and Vodafone plans.

UK Usage (Out of Bundle)

Charge typePrice (ex VAT)Notes
UK calls (exceeding minutes allowance) £0.65 per minute Applies to plans with capped minutes only. Unlimited plans are not affected.
Data (exceeding plan allowance) £0.026 per MB Approx £26.62 per GB. Consider a Data Top-Up bolt-on instead.
Picture / Video message (MMS) £0.66 per message UK picture and video messages sent.
Voicemail Free to listen Standard voicemail included on all plans.
Freephone 0800 / 0808 Free Free from mobile.

Non-Geographic & Premium Numbers

Number rangeAccess charge (ex VAT)Notes
084 / 087 / 09 / 118 numbers £0.79 per minute Access charge only — plus a service charge set by the organisation you're calling.
Premium rate (09xx) £0.79 per minute Access charge — service charge varies. Consider a Non-Geo bolt-on to reduce costs.

International Calls (from UK, without a pack)

DestinationPrice (ex VAT)Notes
Europe, USA, Canada, Australia (Group 1) £1.25 per minute Major destinations. Consider an International calling pack to reduce costs.
Rest of World (Group 2+) £2.50 per minute All other destinations. Consider an International calling pack.
International SMS £0.15 per text Text messages sent to international numbers from the UK.

Roaming (using your phone abroad)

ZonePrice (ex VAT)Notes
Europe (EU / EEA) Included Use your UK allowance at no extra cost. Fair use policy applies.
Worldwide (all other countries) £5.00 per day Daily charge on days you use your phone. Use your UK allowance. Check your destination →

For plan pricing and contract options, please contact us.

Email sales@comparethenetworks.com or speak to your account manager.

All prices shown exclude VAT. Bolt-ons are subject to availability and may vary by network. Only one bolt-on of each type should be applied per subscription at a time. Prices, availability and promotions are subject to change.

If you are unsure which bolt-on is best for your usage, contact us before you travel or place international calls.

Effective from: 20 February 2026 Version: CTN-OOB-20260220-v7