We only refund for "NOT ELIGIBLE FOR UNLOCK" issue, we will not refund any complaint about "Communication Error" or "Server not responding. please try again later.". It is mandatory to check before ordering if your phone have "Server not responding. please try again later." issue. If the answer is yes then you can try to fix this error by performing a hard reset on your phone, or upgrading his firmware. Again make sure your phone can communicate with "Device Unlock App" server BEFORE place your order.