Hi, so recently I switched from my iPhone 5 to an HTC One with an upgrade on my account. When I got the One, I got a new Sim card already pre-installed and ready to activate (which I completely understood.) I still have my old iPhone nano-sim put away. My question is, can I re-activate my original iPhone 5 nano sim in my iPhone? I am planning on keeping the One but right now I just need to switch back to my iPhone. I'm just not sure if my old sim is dead or if it can be re-activated. Any help is much appreciated!!! PS. I forgot to mention that I am on Verizon.