July 19, 2010March 19, 2015 More secret iPhone codes by happyorright More secret iPhone codes. Most of these codes work. With an iPhone 4 the main secrete code of *3001#12345#* didn’t work. Said an error had occurred. I used this code on friends iPhone 5 and it worked immediately to go into the Field Test mode. Related Posts:How important is Amazon AWS? If you aren't an IT person you can be forgiven for not ..iOS phone restarting when started? A new attack disables the iOS ability to work due to being ..Giving Linux another chance I have used Linux off and on for years but it always ..The price of curiosity I had a friend give me his Medifast bars, lunch and other ..