Iphone 3G reset content and info

Iphone 3 G can only be upgraded to 4.2 i think.

to have the phone unlock you will need to contact the switzerland carrier and see if they offer unlocking.

1. Since this is an old phone, the new software runs slower on it. (So I've heard from many others)

The iPhone 3G cannot run "new software." It can only run iOS 4.2.1, not 4.3, not 5.

2. Upgrading it will force it to be locked to the Switzerland carrier, which we clearly can't use.

Then your grandmother was using a hacked phone.

1. The first part was helpful, albeit a bit condescending.

2nd part.     

We got this phone before anyone heard of factory unlocks. Don't be so judgemental, had you been in the same situation, I'm sure you'd have done the same thing.

Nope. I have a strict no-hack policy. And, as a matter of fact, so does this forum: you won't find help for hacked phones here. See ya, wouldn't wanna be ya!

How old are you? Where do you come from, and why are you such a nerd?