I have a CDMA iphone 4 on Ios 6.1.3 that I want to upgrade to IOS 7. Its jailbroken and im not sure if thats what they used to unlock the phone from verizon or if it is factory unlocked. If I update to ios 7 I know I will lose my jailbreak but will my phone be able to connect to the network im on now? can someone please help me with the steps on how to keep my phone working on my network after an upgrade! PLEASE HELP!