The iPhone 4S has the cellular radios to connect to the 3G CDMA EDVO Rev A network offered by Verizon Wireless. It doesn't have the cellular radios to connect to the 4G LTE network also provided by Verizon Wireless.
The iPhone 4S is a CDMA 3G only smartphone.
You can't connect to the 4G LTE network on Verizon Wireless
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.