We want to offer you the most support possible, lautar. We have released the previous SIM lock on the iPhone 4S. When entering another SIM a full wipe of the device is required to begin activation. I apologize as we are unable to support the 3rd party SIM further than this. YaleK_VZW Follow us on Twitter @VZWSupport If my response answered your question please click the "Correct Answer" button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!