Backup Wifi SSID and password on SGSII I updated my sgs2 [I9100] to JB, I want it to format or wipe that clean and stable install. I can backup everything except wifi keys. I guess kies seems have it, but it was not work before.

How can I export or backup them without rooting? Then which way should I follow to format-wipe-resetfactroy like as a brandnew phone?
On newer versions of Android, WiFi settings are backed up along with your Google account (If you've enabled it in Settings -&gt; Backup &amp; reset -&gt; Back up my data), and restored when you link your Google account back to your wiped or new device.

Note that in my personal experience, the Google backup feature is a bit flaky, sometimes it works, sometimes it doesn't. On new devices it usually works, but when wiping/installing ROMs it may fail.