If you are traveling on Finnish roads without a mobile, I hope you are one of those who do not mind doing their physiological needs in the middle of the field.
Due to the vandalism, robberies and conatos of fire caused in the public toilets of the country, the Road Administration Agency of Finland has implemented a interesting way to access toilets and showers They are available for travelers.
If you want to enter, you need to send an SMS from your phone to the number on the toilet door. You send the word "OPEN" and a buzz will be heard and the door will open. And you will think: "once inside the vandal it can act in the same way". Well, if so, it will get into a good problem because the phone number from which the message was sent is registered and will be tracked if damage is discovered.
The invention is fine to prevent vandalism, but if it catches you without mobile or coverage ... the field belongs to everyone.