Update README.md

note the alternative location for WifiConfigStore.xml
as reported in #6 (comment)

Author: mnalis

README.md

@@ -38,6 +38,8 @@ adb shell rm /data/misc/wifi/WifiConfigStore.xml.encrypted-checksum
 adb reboot
 ```
 
+Note that location of *WifiConfigStore.xml* on your device might be something other than */data/misc/wifi* (like */data/misc/apexdata/com.android.wifi*), so you need to verify that first (and update the commands above accordingly).
+
 * enable WiFi on your phone
 
 ## Troubleshooting