On my Galaxy S3 I have only a few options for locking/unlocking:
Either no locking and swiping, or entering a pin every time. Both options are not very attractive. One is too insecure when leaving it somewhere, the other too cumbersome, when I just take it out of my pocket. OK, there are more options, like face recognition and all that, but it never works in the dark.
What I would like to have is a more intelligent scheme: That I do not have to unlock as long as my S3 stays close to me. That a pin is only required, when it is further away from me.
Is something like that available or possible? Maybe in conjunction with an RFID-chip? Or bluetooth? So I would carry in another pocket that other device.