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How to choose a mobile phone tariff

  • Which? help you to find the best type of mobile phone tariff
  • How to save money by switching to a different tariff and how to upgrade
  • We reveal which mobile service providers have the happiest customers
  • Is it cheaper to buy a phone on its own or as part of a contract?

What's in this guide

Contract vs PAYG

The pros and cons of pay as you go, contract and Sim-only. Shop around when deciding how to pay for using your phone.

Choosing a tariff

Top tips to decide on the best deal for you, whether you need a new handset or are just looking for a better offer from your existing provider.

Sim vs traditional contract

We look at which is the cheaper way to buy a new handset. Comparing costs for different-priced models.

Switching

How to upgrade your phone or change provider. Here are your choices whether you're tied to a contract or on pay as you go. 

Customer satisfaction

We look at which networks have the most satisfied customers. Find out what Which? members said about their providers. 

Mobile insurance

Think before taking out costly insurance you might not need. It may not be as comprehensive, or good value, as the salesperson makes out.

Security

How to protect your phone and what to do if it is stolen. Our tips could help stop your mobile becoming one of the 10,000 stolen every month.

FAQs

We give plain English answers to frequently asked questions and problems with mobile phone tariff providers.