The LG Envy requires the user to enter a "lock code" to perform certain functions on the phone. For example, to perform a factory reset, the user must enter the four-digit lock code twice during the ...

It is not possible to directly access the passcode on an iPhone. If you have forgotten the passcode for your phone, then you will need to use iTunes to factory restore your phone so you can reset the ...

This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is ...