Wi-Fi keeps dropping on my iPhone 5?

I have an iphone 5 and I just updated to ios7. This was a problem for me before the update as well. I live in a apartment complex that has free Wi-Fi. I have my own router hooked up through the Ethernet port so that the signal will be stronger throughout my apartment. I have a password set to my router to keep others off of my router. Literally, every two minutes the Wi-Fi signal drops from my phone and I have to reconnect. I don't have to put the password in, I just have to go back to my settings and reconnect. Sometimes I will reconnect and before I can start browsing the web again it drops the signal. Does anyone have a solution for this problem, or is having the same problem?

How do you hook up your free Wi-Fi to your router via Ethernet cable? Or do you mean every apartment in your complex has an Ethernet port for the internet connection?

First check your phone if it is connected to your router in your room. I think your phone is just catching up the weak free Wi-Fi signal which drops now and then.