To attempt to fix this problem follow the following steps:
1: Go to Settings.
2: Tap General.
3: Scroll to the bottom of the "General" list, and tap Reset.
4: Tap Reset Network Settings.
After the iPhone resets the network settings, your iPhone will reboot. Attempt then to reconnect to the WiFi network.
I am sorry for such the delayed response;
Those are the steps the Apple provides to consumers. I recommend you to get your iPhone examined by a Verizon Wireless technician, or you may call Verizon Wireless Consumer Customer Service & Technical Support at (800) 922-0204.
If they fix the problem with a different method, please let me know.