Did you update your iPhone 4 baseband to 4.12.01 after updating to iOS 5.1. Now, is there a way to unlock it?
Quoted from How To Unlock iPhone 4 Baseband 4.12.01 on iOS 5.1 … on Bing: iphone 5
iPhone SIM Unlocking Service - Learn how to unlock Apple iPhone permanently. Find an unlock software/app to unlock iPhone models from UnlockBase. The #1 site for the latest news, tutorials and free guides to unlock iPhone 6, iPhone 7, iPhone 6s, iPhone 5s, and iPhone 5 so you can use any SIM. OS Provide you the best ing service for any GSM Apple . The best day is Facry with iTunes, we also provide Unlock iPhone - iDownloadBlog – Software or official facry . We have turials on 6, 5s, 5, and older devices. Tags: unlock, iphone, idownloadblog, apple, officially with permanent IMEI facry ing. All models, iOS, basebands & firmware supported. Processed by Apple, completed in iTunes. If you have simlock in 4/4s/5/5s/6/6s/7/7s, now you can free ! This is permanent. work in all and iOS. This is 6 6S Plus 5S 5 4S V.9.1 ios 9