If a notice called SIM is not supported, or if another request from the phone app, such as activation code or SIM lock code, appears, the iPhone is locked by your wireless service provider. If you not sure of the exact location of the SIM tray on iPhone, this Apple article will help you find it: Remove the SIM card from iPhone or iPad. Enable a Rogers SIM Card on Home Entertainment by: Matt Connect How to decrypt a SIM card with an IMEI number for the home entertainment of: NachiketDeshmukh How to determine which iPhone you may own home entertainment of: Diana V.Text content (news, call history, notes, etc.) can be saved as .txt, .xls, .xml file; Media content (videos, pictures, notes) appears as original formats like .jpg, . Iphone 4 International Unlock. png, . Where To Buy Unlocked Phones In Melbourne. mp4, etc .; iPhone contacts can be exported as a .vcf file. Note that resetting the network settings will delete iPhone-saved Wi-Fi connections. Make sure you know your Wi-Fi password before trying. I recommend using iTunes because iTunes automatically checks if your iPhone has an update for the carrier settings before updating your iPhone. If so, iTunes will ask you if you want to install it to fix any blacklist and iCloud issues that these iPhones had (I did not fix them because I wanted to buy these iPhones, I did not have them in my possession). So, knowing that if you find an old SIM card or borrow someone else old SIM card, try it in the iPhone and go through the activation process. If you find Apple support to do that I find it easiest to go to the Apple Support site or call my local Apple Store to get an appointment with Genius Bar. If you have not purchased the phone yourself, it could originally be sold as an unlocked phone. In this case, you must know this fact or experiment with two sim to know if this device is actually one that is authorized as an unlocked device.