Help Need Free tool to bypass iPhone 5s

[BoxLocker]

I have got a iPhone 5s bypassed device. It didn't support sim but I can use wifi to connect and AppStore apps. But after I forcefully reset this device with 3UTools, It now stuck in Activation page "Unable to Activate".
I have a windows PC, so can anyone suggest me any free tool to repair/bypass activation on iPhone 5s?

Thanks in advanced.

 

[azofs]

im waiting too...