Today a phone code to enable in your apps list a new tool, MFG!
Open telephone and call ##634#.
After that, in your app list you can view MFG.
MFG use a password to enter in secret menù. Type 277634#*# and click ENTER.
Once opened you can set/view/edit a lot of phone functions, like regedit!
1 Device test
2 ELT mode
3 sw Sanity test
4 factory reset
6 call ui display
7 engineer menu
8 Folder tester
9 IRT test
enjoy and be carefull!!!