This is suggestion
I cant belive there is no-one who mentioned that (search was used)
So my turn - some profile extension like addon for profile switcher
which will be able to do something depend on you position (unique number of bts - your operator transmitter ) maybe with GPS coexistence (for more accurate positioning ) like switching to your home / work wifi network ,change ringing profile ...there is lot of options i think.

There is already a deamon which can check that - like headphoned , i do some search in system ,but could not find any file with bts state, number ,etc ?

I can try to develop it ,if someone will help me