1.Engineer mode - *#110*01# ............2.LCD contrast - *#369# .............3.Factory mode - *#987# ............4.Restore factory setting - *#987*99# ............5.Software version - *#800# ............6.Set default language - *#0000# ..............7.Set english language - *#0044# ...............8.Set english language (new firmware) - *#001#
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