Please read and carefully. You're responsible for not reading the ad. We are selling brand new sim unlocking chips for iPhones. This sim unlocking chip will unlock your iPhone operating on iOS 15.1 to use with any gsm company, and overseas. **Please note that this sim unlocking chip is advertised for use on iOS 15.1 You can downgrade the iOS so that it can be compatible for use with this sim unlocking chip. If you cannot do that, then please do not purchase! Also note that, I had an iPhone 12 running on iOS 15.6 and the sim unlocking chip successfully worked for me. However, this is my personal experience. Buyers must use their own discretion. Instructions is uploaded. Also, it's highly recommended that you research YouTube tutorial videos to help with the success of this sim unlocking chip. This is a do it yourself method, and just like with any other do it yourself methods you are taking a chance. If you are not willing to take a chance, then I recommend you taking your iPhone to a professional, and having them unlock your iPhone for you. Their fee ranges anywhere from $80-150. Fo to $5 you are receiving an absolute deal. Please don't contact me if you do not have the patience to watch tutorial videos etc. Selling for $5 each firm. Local pick up only, in Gaithersburg/Rockville MD. Thanks and God Bless