When you put a new SIM card in an iPhone 3s does it reset everything?

My mum and dad have given my old 3s to a person that works for them and I was just wondering if it will reset everything with a new sim and different computer? I need to know As soon as possible. Xo

No, it doesn't. But just to be sure, back up your phone on itunes before changing your SIM card and then restore your phone from the backup if anything went wrong.

No, new sim card won't make a difference to the phone content

I think no but i'm not sure

Its called the 3GS & no. A different SIM will do nothing to the phone.