Numbers of metal protective case are with antenna problems, but T-MOD offers such solutions to all the iPhone 4/4S users by aircraft grade aluminum case TP4-2001. The hollow design on the side will not impact the reception at all, on the other hand, function buttons and slots are all easy to be access. The back plate gives further protection to the iPhone 4/4S fragile glass back. Meanwhile, it ensures your favorite Apple log and the camera are fully displayed. Made in Taiwan.