.

SIM cards believe it or not come in 4 sizes  SIM Card  - Not used any more; about the size of a credit card. Mini-SIM Card  - The most common in the previous generation, it's what most people would call a SIM card. Micro-SIM Card  - The now standard for smartphones; much smaller; just about contains the contacts on the back. Nano-SIM Card  - I've only seen it used so far in Apple iPhones, but I'm sure it will catch on; this is literally just the contacts. Step 1: Get a Sim Card + Scissors No matter what size, I think most of you will have the Mini SIM Card and will want to cut that down to a micro-SIM card but a Nano SIM is also possible. Step 2: Download This Page and Print This is a link to a page  from a UK mobile network that gives you the guide on how to cut your SIM down to size. Step 3: Mark Up and Start Cutting Obviously be careful when cutting, you will want to follow the guide exactly. You will see the actual memory of t...