Yes, that definitely does sound frustrating. The following article provides troubleshooting steps for the symptoms you described. While I have highlighted a specific section, it may be best to go through the entire article:
Unable to automatically connect to Wi-Fi
- Avoid giving your Wi-Fi network a common name.
- Some wireless routers are preconfigured with a common SSID (network name) such as "wireless" or "default."
- If your desired Wi-Fi network has a common SSID, try changing the SSID to something unique. If needed, please consult with your network administrator (which may be your Internet Service Provider) for assistance with this step.
- If your desired Wi-Fi network has a unique SSID, reset network settings by tapping Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings including:
- previously connected Wi-Fi networks and passwords
- recently used Bluetooth accessories
- VPN and APN settings
Have tried all of these and more. The router is set up just as recommended by Apple. The problem actually seems to be worse in that I have to restart my Modem/Router each time I want to connect. No one but me seems to have this problem when connecting to my own network. I am starting to feel this is an iPhone5 and/or iOS7 problem. This is my second iPhone5. My initial one was replaced under warranty just a couple months ago. It was restarting over and over and finally just gave up the ghost. This particular problem has only existed for me since "upgrading" to iOS 7. And, YES, I have the latest version if iOS 7 as well.
Thank you for using the Apple Support Community. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://getsupport.apple.com
Im having what sounds like the same exact problem. On my iPad and iPhone I must constantly "reboot" in order to connect to the local wifi. This is happening on two devices and it happens on different wifi networks. I have tried all the suggestions reference turning off wifi, resetting wifi, rebooting and then reconnecting everything, but the original behavior has not changed.
Because the devices will drop the wifi connection and switch to LTE without any notification, I constantly find myself draining my LTE data while a perfectly good wifi connection is available but unused.
Im still looking for a solution. Has anyone found anything further about this problem?