Audiovox 4000, 9000, 9100, 9155, 9500

Power the phone ON and wait until the little light on top goes out, then press:
Nam Set: 289,Fcn, #,1
Service menu: Fcn,0,0, FSC

Power the phone ON and press:
Test Mode: Hold (2,*,Rcl) + Power

Test Mode Commands:
99 - download - flash phone
124 - inam data write
125 - version
126 - get ESN
127 - get SPC
128 - get User lock
129 - is WFTV data write
137 - get FSC code
138 - NPcode (nam program code)
139 - dscode
141 - restart
218 - Read_Addr
000 - is cdma mode
001 - is fm mode
002 - is pcs mode
008 - is reg read addr
020 - is lna_range