Iphone 3gs sim into 4s phone?

I currently have a iPhone 3GS 8GB. I want to go on craigslist and buy an iPhone 4s AT&T 16GB, would it work if I just put my sim from the 3GS to the 4S and go on normally?

It should work just fine, but you might have to update phone a couple of times.

No iphone 4s uses micro sim card. You need to cut your old sim card or get one from at&t.watch video on YouTube how to cut it.

No. The 4 & 4S use microSIMs. You'd either have to cut your sim to size or get a new microSIM with your number on

The iPhone 4S uses a micro sim card, while the iPhone 3GS uses a normal sized sim card. You either need to get a micro sim from AT&T (they give them out for free) or cut your existing sim card.

The only thing different about the 2 sim cards is the plastic around it, so you could simply cut it smaller without problems.

  • If I cut my sim into a micro sim will my iPhone 4S work fully? I currently have a Blackberry Bold 9900 which is in contract but am getting a iPhone 4S. But the sim in a blackberry is not the right sort for the iPhone 4S, so if I bought a 'micro sim cutter' and cut the sim from my blackberry and put it into a 4S, would the iPhone work fully like apps, siri etc and I get all my minutes, data and calls etc…
  • How to get your andoid sim into a nano sim for an iphone? I want to stay with my contract on ee but have an iphone instead of my android phone. I've heard that if I buy an iphone that is unlocked to ee I can put my sim in it if i cut it. Is this true and how can I do this?
  • How to get into a phone that has Find my iPhone activated but no sim card? Or contact the owner of this lost phone? I found this phone on the sidewalk today and I have been trying to find out who it belongs to. I thought that if I went to get the sim card, I could contact their provider (like ATT, Versizon, etc) and ask them to return the phone. But there isn't even a sim card on the phone. It also has this Find My iPhone thing, so it feels like there's nothing I can do. Any suggestions on how I could get it back to the owner?
  • Can you switch SIM cards between iPhone 3GS and another iPhone 3GS? Me and my boyfriend are switching iPhones because mines cracked and he said hell use it till I get a new screen. We have the same kind of iPhone, both 3GS. I was wondering, if we could just simply switch SIM cards. Like me move mine to his phone, and him move his to my phone. And the phones actually work. If we do so, will our numbers automatically switch over? And what about contacts and what not. I'm mainly worried about our numbers.