Mobile phone providers advice guides

Want to switch mobile phone provider but don't know where to start? Our latest satisfaction survey results will help you make the right choice.

We regularly survey thousands of mobile phone customers so we can tell you exactly how Asda Mobile compares with other phone providers.

Discover which network has the best phone signal where you live using our coverage checker – it uses millions of readings from real customers.

New mobile phone signal analysis has found one network is way out ahead when it comes to offering the best 4G service.

Exclusive new data produced for Which? by mobile phone benchmarking experts OpenSignal reveals which UK cities offer the best chance of getting a 4G signal and which have the fastest download speeds. Read on to find out more.

Want to upgrade to the latest smartphone and avoid being tied to a long-term contract? Yearly upgrade deals promise to make it easy, but are they too good to be true? Find out how they work, and what you should watch out for.

Many of us are reluctant to haggle. But we shouldn't be – it can often get you a better deal. Follow our top tips to save money on your mobile phone contract.

5G promises faster data than ever - find out when and where you'll be able to use it in the UK, and how fast it really is.

EU roaming charges are a thing of the past, but you still need to be careful using your phone abroad. We look at the benefits of EU roaming, hidden costs, and charges if you go further afield.

Want to use your mobile phone abroad and avoid astronomical bills when you get home? Read our top tips to get your phone prepared.

Exceeding your mobile allowance can result in hefty bills. Find out how to monitor your bundle on iPhones and Android phones to make minutes and messages last longer.

Find out how to switch to a better mobile network provider with our expert advice

Whether you're a download-addicted smartphone owner or just want to make the odd call, we'll help you get the best-value phone.