A pair of straight, sharp scissors A nano-SIM card for comparison A pencil A file (or sandpaper) A ruler
Micro-SIM - Measures 12mm by 15mm. Standard SIM - Measures 15mm by 25mm.
The left side of the standard SIM card is the side that doesn’t have an angled piece missing from the corner. Skip this step if you have a micro-SIM card.
Place the standard or micro-SIM card on a flat surface. Make sure that the angled corner of the SIM card is in the top-right corner of the card when looking down at it. Place the nano-SIM card on top of the SIM card. Make sure that the angled corner of the nano-SIM card is in the top-right corner of the card when looking down at it. Make sure that bottom-left-most corner of the nano-SIM card is lined up over the bottom-left-most corner of the SIM card that you’re going to cut.
Some Android phones don’t use a SIM tray. If this is the case for your phone, just try to insert the SIM card into its slot.
Keep the majority of the plastic at the top of the SIM intact until after you’ve tested the SIM card’s fit. Keep in mind that a nano-SIM card still has about a millimeter of plastic around its perimeter, so stop short of removing 100 percent of the plastic. Use the existing nano-SIM card that you have as a reference for this step.
If the SIM card still doesn’t fit, you’ll need to file it down some more. Again, if you’re using an Android phone that doesn’t have a SIM tray, just try to push the SIM card into the SIM slot.
