i still get unknown error. should we add this line? "" <entry key="PHONENR" value="YOURNUMBER"/> "" coz there is nothing to edit. my default prefs.xml is this-- <?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE map SYSTEM "http://java.sun.com/dtd/preferences.dtd"> <map MAP_XML_VERSION="1.0"> <entry key="IMEI" value="356938035641084"/> <entry key="REGSTEP" value="1"/> </map> where to add the phone number. sorry if this post irritates anyone.