How long 120mg. well, the half-life of methadone can be up to 59-hours, so after 2 and half days you would still have 60mg's in your system. But this doesn't take into account multiple doses.
A third type of lock is a security lock. This lock is like a typical password, to prevent someone other than the owner from using the phone. If activated accidentally, the user manual or carrier customer service can usually tell you the default code.
Code Access Security (CAS) Definition - What does Code Access Security (CAS) mean? Code access security (CAS) is a security mechanism by which the common language runtime (CLR) of the .NET framework can restrict the managed code to execute operations with a limited set of permissions. CAS enforces security policies in the .NET framework by preventing unauthorized access to protected resources and operations.