Can I connect an Iphone 4s to boost mobile?

I bought one and I want to know if I can add it to my plan.

You would have to unlock it, which is illegal now as of January 26th. Even after you do that, you may not be able to activate it on Boost Mobile. Virgin Mobile has the iPhone 4 and 4S. Virgin Mobile and Boost Mobile are on the same network. Also it would depend on if it was the CDMA version, or GSM. If you have the GSM version that takes a SIM card, you can put it on Straight Talk or NET10.

No. Boost Mobile runs on a CDMA network and it would have to run on GSM to be compatible with your iPhone. If I were you, I'd go to walmart and pay $15 for a SIM Card and use it on Straight Talk. It is only $45 monthly for unlimited everything. It runs on AT&T and T Mobile's Network

If it's a CDMA version of iPhone 4S, you can get it flashed to Boost. If you've the unlocked version or the GSM version, you can't. You can mail this person (arghyle@rocketmail.com) who can help you with it.