Case in point: Three has some stupidly cheap SIM only deals on the go, which are perfect for those where money is tight. Grab 8GB of data for just £8/month with Three's SIM Only deal right now ...

Luckily (and no matter the reason you're looking for one), there is a massive range of SIM only deals currently available, ranging from the cheapest plans possible all the way up to the holy grail ...