How do you convert a standard SIM card to a micro SIM card?

It's very easy; so easy it might be a little silly to devote a whole article to the task. In a word: cut.

Unnecessary tools:

• A nail file
• Sandpaper
• A ruler
• A pattern
• A brain

Since there is quite a risk of damaging the SIM card in this process, step 1 is to call or visit a location for your carrier, like an AT&T store; they often have the tool to convert a standard SIM to a micro SIM and will do it for you, free of charge. 

If you are conducting the surgery yourself, come to terms with the reality that your SIM card might not survive the encounter -- but I think it will. The only thing that's difficult about the process is determining exactly where to cut your card. There are a lot of diagrams and patterns that you can print out, but I find them more confusing than beneficial. Find a picture, like the one above, that shows a SIM card with the same design as yours. A standard and micro of the same SIM, to show before and after, would be the most helpful, but I did just fine with only the after, micro part. 

The material of SIM cards is a lot easier to cut than you might expect. I read dire warnings that if your scissors aren't sharp enough to slice through a 1-inch stack of index cards, simply by placing the stack within 4 inches of the scissors, you have no chance of success. I found this misleading; my scissors fall under the category "eh." I decided to try it with my inadequate tools because I knew it was cut the SIM or buy a new one -- not a lot of risk.

Open up your phone and locate the slot into which you tried to mash your SIM card, before you realized it was micro. Study the slot. Be the slot. This will help guide your hand as you cut... maybe. Compare your standard SIM to the micro SIM example you located, and cut so that it will match ex posto facto (you might want to keep in mind the size of that slot). Cut much, much, MUCH less than you think you should. One tiny sliver at a time. It will probably fit bigger than you were expecting. Don't forget it goes in the tray upside down... put the angled corner on the same corner as when it was standard; don't mix that up. By the way, you do not need to sand or shave or in any way de-roughen or slenderize. Even if your particular phone takes the kind of SIM that is shorter than standard, it should fit without shrinking. All that matters is the metal part... the conductors.

Now at some point just stick it in... wiggle it around a little... it'll probably work.