Why is Nokia so stubborn and doesn't give up the mobile phone market?

Nokia's stubbornness lies in its core technology. At that time, mobile phones were in the ascendant, and Nokia's global GSM network technology reduced the cost of mobile communication, which reduced the cost of mobile phones by ten times. Now Nokia has a lot of black technology-5G has been tested, and it is still developing graphene, a new material that is extremely hard and thin (only one atom thick). Nokia no longer sells products to your mobile phone, but to other companies. In 20 15, Nokia and China Mobile signed a one-year framework agreement with a value of136 million euros; 20 16, 13 July, signed a new agreement with Samsung to expand the scope of patent cross-licensing. When you use Samsung or China Mobile, the expenses you pay are also shared by Nokia. So Nokia will not give up the mobile phone market.