To Bypass the activation required screen after you upgrade to IOS 7. Note that this process worked for me because I have a SIM card. 1. Power on the iPhone, 2. While the phone is booting and you have the apple logo display, 3. Insert your SIM card. 4. Bypass the wireless connection. 5. Viola. Done. This process works for me. I hope its works for you too. NB: Another way around is to keep clicking try again continuously.