not all sim are created equal...but if it fit the same then why not give it a try. It most likely will not hurt the phone.
Okay, I'm a noob. I admit it. I don't understand at all how certain things work. Here's the issue.
I met a girl a while back at a social event that is coming up again. I went to ask if she was going, before realizing that due to how Verizon Backup ended up not working on my old phone, I don't have her number. What's worse, my old phone won't work anymore. Won't even charge.
I, however, have the SIM card for the old phone. The issue is that with this old phone I had switched to another carrier, and I believe this SIM card is with the other carrier.
My current phone is Verizon-enabled. Will inserting my old SIM card into the new phone cause me issues?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic