You will need to use a nano SIM card for your One M9.
Nano SIM is the smallest out of the three commonly used SIM card sizes, barely larger than the metal contacts on the card. You can see these SIMs – mini, micro and nano – in the graphic created by Justin Ormont for Wikipedia.
HTC recommend that you do not cut down a mini or micro SIM card to a nano SIM size, as the nano SIM is actually smaller in every dimension – including depth. A cut nano SIM may therefore get jammed in your One M9’s SIM slot. If you’re worried about this happening, order a new nano SIM from your mobile operator or the retail store that you purchased the phone.
Conversely, I’ve successfully used a cut nano SIM without suffering any inconvenience. If you’d rather go this route, then you can pick up a nano SIM cutter tool from Mobile Fun… although it will mean you’ll need to use a nano SIM adapter if you put your SIM back into a micro SIM phone.
Questions? Comments?
I hope this article answered your question. If you’d like any clarification or wish to leave a comment, you can do so below. If you prefer, you can also tweet us @mobilefun. Regardless of the medium, we’ll be happy to help.