Unlocked iPhone 4S with active AT&T sim card

[dunston]

Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

I just got my unlocked iPhone 4S and was wondering if I can put in my current AT&T sim card without getting locked back on AT&T. I am eventually switching to t-mobile but want to start to use my iPhone 4S. Thanks everyone!

 

[saving107]

If purchased unlocked, it will always remain unlocked.

 

[dunston]

Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Cool, thanks. That's what I was hoping, but not 100%.