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Catherine HileyMobiles Expert

Catherine is the expert on mobile phones and smart tech here at, keeping all our guides bang up to date with the latest handsets and filling our pages with helpful money-saving tips.

Mobile phone display

Samsung Galaxy S10 vs. S9: what's the difference?

The Samsung Galaxy S9 and S10 are two of Samsung's flagship phones - but which is better? Which should you choose? Our guide attempts to pick a winner.

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Woman using mobile phone abroad

Mobile roaming charges

For the sake of your bank balance, it's important to know how mobile roaming charges apply to you while you're abroad. Find out about them in our guide.

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Mobile phone safety

When it comes to mobile phone safety, how can we ensure that our children aren't caught out? Our guide to mobile phone safety lays out some best practices that everyone can follow for a more secure mobile experience.

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Girl using phone with eSIM card

What are eSIMs?

eSIMs are the latest iteration of the SIM cards our phones rely to make calls. Find out how they work and how they might affect your phone in our comprehensive guide.

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Girl watching video over 4G

What is 4G?

Do you consider phone connectivity when choosing a new phone? Learn all about 4G mobile network coverage here and find out how it compares to its predecessors.

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People holding mobile phones

How to switch mobile network

Switching mobile network is common enough with so many companies operating at the moment, but it can be confusing if you've never done it before. Our guide runs down the hows, whys and wherefores of the process.

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Woman using data on holiday

What’s the best network for roaming outside the EU?

If you often travel internationally, you'll need a mobile network that allows the cheapest possible data roaming outside the EU. Read our guide to assess your options.

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How to unlock a phone

If you want to switch networks but keep your handset, you'll need to make sure the handset is unlocked. How can you do that? Read our guide to find out.

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How to port your mobile phone number

To avoid having to change your number and tell all your contacts every time you get a new phone, it's necessary to port your number. But how? This guide tells you all you need to know.

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Man refurbishing a phone

Should you buy a refurbished phone?

Although new phones are tempting, there are also good deals to be found on phones that have been refurbished. Would they be a good option? Find out about refurbished phones here.

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Woman using data on smartphone

What are mobile data allowances?

Getting online and using data is such a big part of using smartphones these days that it's important for you to know what your data allowances are and what they could cost you. Our guide covers all the questions you have about mobile data allowances and more.

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