Mobilecompare
0330 059 9711
We are an independent comparison and sales platform. We are NOT affiliated with O2.

Compare O2 SIM-Only & Upgrade Deals

Speak to an independent expert and find the right O2 plan for you — SIM-only, contract, or upgrade. No jargon. No pressure.

✅ Independent Advice 🔒 No Hidden Fees 📞 UK-Based Advisers
Call 0330 059 9711 Compare Plans

Available Mon–Fri, 9am–6pm · Speak to an expert to compare O2 plans

🔍 Independent Unbiased comparisons
💬 Transparent No hidden fees ever
🇬🇧 UK-Based Expert advisers
⚡ Fast Decisions Compare in minutes
About Mobilecompare

Who We Are & How We Help

Mobilecompare is an independent UK-based comparison and sales platform. We help consumers compare and select mobile plans — including O2 SIM-only deals, phone upgrades, and contract options — so you can make an informed decision that suits your needs and budget.

We are not O2, and we are not affiliated with, endorsed by, or acting on behalf of O2 or Telefónica UK. Our advisers are here to guide you through the options available and help you choose and activate the plan that works best for you.

Not affiliated with O2 · Independent comparison platform · UK registered
O2 Plan Options

Compare O2 Plans & Deals

Plans and pricing shown are for illustration. Call us to check the latest O2 offers available today.

SIM-Only

Starter SIM

Popular
  • ✓ From 5GB data
  • ✓ Unlimited calls & texts
  • ✓ 1-month rolling contract
  • ✓ O2 5G-ready network
  • ✓ O2 Priority rewards access
Prices vary · Call to check today's offer
📞 Call to Check Offer
⭐ Best Value

Unlimited SIM

Flexible
  • ✓ Unlimited data
  • ✓ Unlimited calls & texts
  • ✓ 1, 12 or 24-month options
  • ✓ 5G at no extra cost
  • ✓ Roaming options available
Most enquired plan · Offers change frequently
📞 Call to Check Offer
O2 Upgrade

Phone Upgrade

24-Month
  • ✓ Latest handsets available
  • ✓ Choose your data bundle
  • ✓ 24 or 36-month contracts
  • ✓ iPhone & Android options
  • ✓ O2 Priority included
Upgrade eligibility varies · Ask an adviser
📞 Call to Check Offer
Switch to O2

Switch & Save

Any Network
  • ✓ Keep your existing number
  • ✓ PAC code support available
  • ✓ Switch in as little as 1 day
  • ✓ SIM or handset included
  • ✓ Adviser-guided process
Quick & hassle-free · We guide you through it
📞 Call to Check Offer

📋 Important: Plan details, availability, and pricing are subject to change and depend on O2's current offers. Always confirm the latest terms with our advisers before making a decision. Mobilecompare is an independent platform and is not O2.

Simple Process

How It Works

Getting the right O2 plan is straightforward with Mobilecompare. Here's what to expect.

1

Call & Compare

Call 0330 059 9711 and speak to one of our UK-based advisers. Tell us what you need — data, budget, contract length — and we'll walk you through the O2 options that match.

2

Choose Your Plan

Our adviser will help you compare O2 SIM-only deals, upgrades, or contract options. No pressure — take the time you need to decide on the plan that's right for you.

3

Confirm & Activate

Once you've chosen, your adviser will guide you through confirming and activating your new O2 plan. Switch smoothly with expert support every step of the way.

Start Now — Call 0330 059 9711

Mon–Fri 9am–6pm · Speak to an expert to compare O2 plans · Calls may be recorded for quality & training

What Our Customers Say

★★★★★

"Really helpful adviser — explained all the O2 SIM options clearly and helped me pick the best unlimited plan for my needs. Saved me time and hassle!"

Sarah M., Manchester

★★★★★

"I wanted to upgrade my phone and wasn't sure which O2 deal was best. Called Mobilecompare and got everything sorted in about 15 minutes. Brilliant service."

James T., Birmingham

★★★★★

"Switching from another network seemed complicated, but the adviser walked me through getting my PAC code and setting up my new O2 SIM. Very easy process."

Priya K., London

Reviews are from verified Mobilecompare customers. Individual results may vary.

FAQ

Frequently Asked Questions

Everything you need to know before calling us.

Are you O2? Are you affiliated with O2? +
No. Mobilecompare is an independent comparison and sales platform. We are not O2, and we are not affiliated with, endorsed by, or acting as an agent of O2 (Telefónica UK). We help consumers compare and purchase O2 plans and other mobile options, but we operate entirely independently.
How do I upgrade my O2 phone? +
Upgrading is straightforward. Call us on 0330 059 9711 and our advisers will check which O2 upgrade options are currently available, help you pick the right handset and data bundle, and guide you through the confirmation process. Upgrades typically require you to be an existing O2 customer nearing or past the end of your current contract.
How do I switch from another network to O2? +
Switching is easy. You'll need a PAC (Porting Authorisation Code) from your current network to keep your number — you can get this by texting "PAC" to 65075. Call us and we'll help you choose an O2 plan and walk you through the switch process. Most switches complete within one working day.
What information do I need when I call? +
To help you quickly, it's useful to have: your current monthly budget, your approximate data usage (you can check in your phone settings), whether you need a SIM only or a handset, and your current network if you're switching. Our advisers will walk you through everything else — no preparation needed.
Are there any fees for using Mobilecompare? +
Our comparison and advice service is free to use. Our 0330 number is charged at a standard national rate — the same as calling 01 or 02 numbers — and is included in most UK landline and mobile bundles. You will only pay for the mobile plan you choose to take out.
Can I compare plans without committing? +
Absolutely. You're under no obligation to purchase. Our advisers are here to help you understand your options — if you're not ready to commit, that's completely fine. We'll answer your questions and you can take as long as you need to decide.

Transparency & Important Information

⚠️ Independence Statement

Mobilecompare is an independent comparison and sales platform. We are not O2, Telefónica UK, or any O2 subsidiary. Use of the O2 name on this page is for informational purposes only — to describe the plans and services we can help you compare. We do not claim any official, exclusive, or endorsed relationship with O2.

📋 Offer Accuracy

All plan details, data allowances, and pricing information on this page are indicative and subject to change at any time. Current O2 offers and availability should always be confirmed with our advisers at the time of enquiry. We cannot guarantee that any specific deal will be available.

🔒 Data & Privacy

When you call us, we may collect and process personal data (name, contact details, account information) to provide our comparison and sales service. Your data is handled in accordance with UK GDPR and our full Privacy Policy. Calls may be recorded for quality and training purposes. We do not sell your data to third parties.

📞 Call Costs

0330 numbers are charged at the standard national rate (same as 01/02 numbers). Calls are free if you have inclusive minutes in your mobile or landline plan. Calls may be recorded for quality assurance and training purposes. By calling, you consent to this recording.

Regulatory note: Mobilecompare is an independent third-party platform. If you require direct O2 customer service, technical support, or account management, please visit o2.co.uk or contact O2 directly. We are not authorised to access or manage existing O2 accounts.

Ready to Compare O2 Plans?

Speak to an expert adviser today. No pressure, no obligation — just clear, helpful advice.

0330 059 9711

Mon–Fri 9am–6pm · Speak to an expert to compare O2 plans · We are not affiliated with O2

📞 Call 0330 059 9711