Is Cutting Sim Card Safe?
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...
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.
How much of a SIM card can you cut?
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.
Is it OK to cut Micro SIM to Nano?
As you can see, Nano-SIM cards are slightly thinner than Mini- and Micro SIMs. Nevertheless, even if you cut a Micro-SIM to fit into a Nano-SIM tray, you should be just fine.