So your asking basically the same question in 2 different areas?
Why would you need WiFi on a Femtocell? Are you trying to use a Femtocell in place of a router?
I'll say the same thing i said in your other question. A Femtocell is used in areas where cell phone coverage is hard to get for your service provider. It's basically like a mini cell tower for your home or office that connects to your cell phone provider's service network through your ISP. A Femtocell has a single RJ45 jack on the back. So in order to connect it to your Internet connection you'll have to plug it into a router. A Femtocell isn't going to give you access to your cell phone's data connection. If you want to have WiFi access to your cell phones data connection you need to get a mobile hotspot from your carrier.
