Unless you're a surgeon, scissors probably won't do. Even if you use one of those “certified” cutters, you can still damage the SIM contacts. ... The whole problem is that if you slightly damage the SIM contacts or the SIM card does not lay in the SIM tray correctly, the SIM may still appear to be working.

Can you cut your SIM card yourself?

It is typically as easy to cut through the metal of the SIM card as it is the plastic card surrounding it. You can also use regular scissors but the smaller pair offer more accuracy. ... It's better to trim it slightly large and squeeze it in, rather than cut off too much and it be wiggling around inside the SIM card slot.

Can you cut a SIM card to micro size?

You can cut it down to size and convert any standard SIM to a micro SIM. ... This is what you'll need to perform the manual SIM to Micro SIM conversion: Patience, and up to 15 minutes. Sharp scissors – for cutting the sim card.