No one likes the noisy ringtone, and if your mobile phone is not on you, you will not feel it vibrate. Nokia has come up with a new incoming call reminder solution, but you need a tattoo.In a recent application submitted to the United States Patent and Trademark Office, Nokia described such a design: using magnetic ink embedded in the skin to interact with mobile phones that can generate electromagnetic fields. This interaction can produce perceptible stimuli for the user, and different inks can represent different meanings, such as SMS reminders, incoming calls, or alarms.In other words, your tattoo can vibrate with your mobile phone.This mobile phone tattoo looks no different from a regular tattoo, but it is drawn with special ink containing magnetic powder. Like a mobile phone ringtone, the owner of the tattoo can also customize the vibration type, such as specifying different stimulation methods for different callers, or distinguishing between text messages, emails, or calendar reminders.If you don't want a tattoo, Nokia also has a more conventional option. The patent mentions covering the skin with magnetic material, such as labels or badges. In the schematic diagram provided by Nokia, we saw stickers on the user's wrist and abdomen.Whoever says Nokia does not innovate, I will argue with them.