You’ve got a swanky new phone, you want to put your old SIM card in and you’ve realised it doesn’t fit…. Alternatively you’re pretty new to smartphones and don’t have a clue what the SIM card is or where it even goes. This predicament isn’t unheard of but fear not, it’s all simple to sort out.

What does SIM means?

SIM stands for Subscriber Identity Module.
SIM cards are effectively mini circuit boards which identify your service provider and your mobile phone number

But as technology has advanced, the size of some SIM cards has gone down. In the UK three different types of SIM card now exist.

We talk you through each one and where you might find the SIM card slot to get your phone up and running.

1.Standard SIM Card

The standard SIM card is the original SIM and largest of the three. Standard SIMs are mainly used on older phones these days such as the basic phones such as the Nokia 105.
This SIM measures 25x15mm.

2.Micro SIM card

The Micro SIM card is essentially a standard SIM card with the extra plastic around the circuit board trimmed off.
This SIM is more likely to be used for smartphones introduced from 2010 till today,

3.Nano SIM card

The Nano SIM card is the most recent type of SIM card which only measures 12.3×8.8mm. It's used for newer smartphones, on the REDMI note 7 and other devices.

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