Q: hi ive recently had my screen replaced on my iphone 4s, but nowthe phone. Please can anyone help me.

Hi Ive recently had to get my screen replaced on my iPhone 4s due to damage, it was still working 100% fine even with the cracked screen but after recieving it back with the new screen all im getting is a searching signal and cannot use the phone at all to make calls ect.. Can anyone help me please.