Buyers Guides

WhatSIM Blog and Buyers Guides

WhatSIM is here to help you navigate the complicated world of Mobile phones and SIM contracts. Check out the latest technology news and how to guides for all the UK mobile networks and phones from leading brands like Apple, Samsung, Huawei & Oneplus.

Out top SIM Only contracts help you save money and get connected quickly and easily. We search the entire market to help you find the best value SIMO deals.

reset your iPhone

How to factory reset your iPhone

Need to reset or reinstall iOS on your iPhone? There are lots of reasons to do a factory reset - perhaps you are selling your phone or just fancy a fresh start. This guide will take you through the ...

Can I become an ESports champion on my phone?

Mobile esports have been steadily growing in popularity in recent years. Although they have a long way to go to catch up to the top level PC ESports community, they always attract huge audiences at ...
Crash Bandicoot On The Run

Crash Bandicoot: On The Run Game Review

Crash Bandicoot: On the Run is a new entry to the Endless Runner action game category for mobile devices. It feels like a classic runner game and fits the visuals of the Crash Bandicoot games we're ...
Getting started with SIM Only

Getting started with a SIM Free phone

When you buy a SIM Free phone it's up to you to set it up with your SIM card . This guide tells you what to expect and should help you set your new SIM up.
What is a 30 day rolling contract?

What is a 30-day rolling SIM Contract?

What is a 30 Day Rolling SIM? One month SIM-only contracts, or 30-day SIMs as they are also known, have introduced a new level of flexibility to pay monthly mobile phone deals. Gone ...
How to monitor and reduce your mobile data usage

How to monitor and reduce your mobile data usage

Our need for mobile internet has grown with the advancements in smartphone technology and, where before you would pay a higher price for calls and texts, data is now the most expensive part of a ...
porting your sim

How to port your mobile telephone number

Porting is the process of transferring your existing mobile phone number to your new contract on a different network. This works the same with SIM only contracts as it is with any other contract, so ...
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