I USED THE DCT4 CODE CALCULATOR TO UNLOCK A 5100 BUT THE PHONE NEVER ACCEPTS THE CODES COULD ANYONE HELP?
more then 5 code lock you'r fone , if you do this go to someone who have gryffin or nellix.
I've one 5100 too, and no code is accepted, nor 21407 nor 21402. The phone always display "Error de codigo" ("code error").
I think when code is keyed 5 times, the message is "imposible deshacer restriccion" ("unable to undo restriction"), so ... what is the correct calculation for this phone? :)
bye!