My iphone 4s keeps losing Wi-Fi signal from my home hub?

I recently downloaded apple latest update for the iphone 4s and it connects to my home network however it does lose connection.

It's a power saving feature when the Wi-Fi isn't being used. I've found disabling data roaming keeps it connected, but it will need turning back on for normal 3G usage.

Apple did it because they have no clue what they're doing. They say its to save power When not using Wi-Fi, but mine sisconnects from Wi-Fi while web surfing (it's doing it right now in fact, also it decided to capitalize "when" for no reason and change "disconnects" to "sisconnects", then ask me what that word is, even though it put it in for me.)

Could need a new "Wi-Fi assembly"

I have a simlar issue. Was having a really weak signal form my router. I send it in to http://www.appletreecanterbury.com They are good if your in the UK you can post it in.

Think i paid £20 and was back to me in 3 days