Phone 5S Disabled iOS 7.1.2 i have to switch to emergency call for every attempt?

Hello, i recently bought the ip-box + charge cable + ios8 adapter.

I have an iPhone 5S iOS 7.1.2 Disabled.

I need to switch to Emergency Call after every attempt of ip-box ?? or i can let it in iPhone is disabled screen during the process.

Please help me with a step by step guide. Thanks. Have a nice day to all.