Wi-Fi Booster is compatible with iOS 6, it helps you connect to multiple Wi-Fi networks

  Wi-Fi Booster is a tweak released many months ago in Cydia, and through it you can eliminate the signal limit that prevents the display of many networks around you. iOS only displays the networks that have a signal of a certain strength, and those that do not fall into this category are not displayed at all, you not knowing that they exist. This is where Wi-Fi Booster comes in, which eliminates that limit, displays all the networks around you, and you can choose which one to connect to, but the tweak does not guarantee that you will be able to establish that connection.

WiFi Booster is a tweak for the Settings app that enhances the Wi-Fi networks list to display all networks in range by removing the signal level limit. This allows you to connect to as many networks as a WiFi scanning app would see, eg WiFiFoFum, directly in the Settings app. Sometimes the number of networks available is increased by over 100%! The network list item has also been enhanced to show the BSSID (AP MAC address) and RSSI (signal level) for each network. No new icons have been added to your home screen. Enhancements are for the Settings app's Wifi Network list.

  Wi-Fi Booster is available for $1.99 in Cydia's BigBoss repo and now you can use it with iOS 6.