Even though we are still waiting on an iPhone 4S software unlock from the Dev Team, there are a couple of hardware unlock solutions available. Just last week we told you about the TPSIM SIM interposer, and now another one has surfaced.

The R-SIM is a turbo SIM card for your iPhone 4S that will unlock your handset, allowing you to use it on any compatible GSM network in the world…

It looks like your typical SIM interposer. There’s no need to jailbreak your handset or modify your regular SIM card. Just slide your SIM into the R-SIM tray and insert it into your iPhone 4S. Then select your country and carrier, and enter 112 mode — pretty standard stuff.

The device, however, does have its caveats. For instance, it doesn’t work with 3G networks. So you’ll be limited to slower GPRS browsing speeds while you’re away from Wi-Fi. It’s also worth noting that the R-SIM still says “be the first to review this product” next to it, which is usually a red flag. We always recommend waiting until a credible source has confirmed that a product works as advertised before purchasing it.

But if that’s not enough to deter you, the R-SIM is available from EachSupplier for $57.99. The shipping is free, and the site says it can get it to you within 2 weeks. Be sure to let us know how it works for you!

Thanks James